diff --git a/app/src/main/java/com/topjohnwu/magisk/core/download/DownloadService.kt b/app/src/main/java/com/topjohnwu/magisk/core/download/DownloadService.kt
index ce57ccc60..868057295 100644
--- a/app/src/main/java/com/topjohnwu/magisk/core/download/DownloadService.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/core/download/DownloadService.kt
@@ -13,16 +13,12 @@ import com.topjohnwu.magisk.core.tasks.EnvFixTask
 import com.topjohnwu.magisk.extensions.chooser
 import com.topjohnwu.magisk.extensions.exists
 import com.topjohnwu.magisk.extensions.provide
-import com.topjohnwu.magisk.extensions.subscribeK
 import com.topjohnwu.magisk.model.entity.internal.Configuration.*
 import com.topjohnwu.magisk.model.entity.internal.Configuration.Flash.Secondary
 import com.topjohnwu.magisk.model.entity.internal.DownloadSubject
 import com.topjohnwu.magisk.model.entity.internal.DownloadSubject.*
 import com.topjohnwu.magisk.ui.flash.FlashFragment
 import com.topjohnwu.magisk.utils.APKInstall
-import io.reactivex.Completable
-import kotlinx.coroutines.GlobalScope
-import kotlinx.coroutines.launch
 import org.koin.core.get
 import java.io.File
 import kotlin.random.Random.Default.nextInt
@@ -37,20 +33,20 @@ open class DownloadService : RemoteFileService() {
             .getMimeTypeFromExtension(extension)
             ?: "resource/folder"
 
-    override fun onFinished(subject: DownloadSubject, id: Int) = when (subject) {
-        is Magisk -> onFinishedInternal(subject, id)
-        is Module -> onFinishedInternal(subject, id)
-        is Manager -> onFinishedInternal(subject, id)
+    override suspend fun onFinished(subject: DownloadSubject, id: Int) = when (subject) {
+        is Magisk -> onFinished(subject, id)
+        is Module -> onFinished(subject, id)
+        is Manager -> onFinished(subject, id)
     }
 
-    private fun onFinishedInternal(
+    private suspend fun onFinished(
         subject: Magisk,
         id: Int
     ) = when (val conf = subject.configuration) {
         Uninstall -> FlashFragment.uninstall(subject.file, id)
         EnvFix -> {
             remove(id)
-            GlobalScope.launch { EnvFixTask(subject.file).exec() }
+            EnvFixTask(subject.file).exec()
             Unit
         }
         is Patch -> FlashFragment.patch(subject.file, conf.fileUri, id)
@@ -58,7 +54,7 @@ open class DownloadService : RemoteFileService() {
         else -> Unit
     }
 
-    private fun onFinishedInternal(
+    private fun onFinished(
         subject: Module,
         id: Int
     ) = when (subject.configuration) {
@@ -66,18 +62,15 @@ open class DownloadService : RemoteFileService() {
         else -> Unit
     }
 
-    private fun onFinishedInternal(
+    private suspend fun onFinished(
         subject: Manager,
         id: Int
     ) {
-        Completable.fromAction {
-            handleAPK(subject)
-        }.subscribeK {
-            remove(id)
-            when (subject.configuration)  {
-                is APK.Upgrade -> APKInstall.install(this, subject.file)
-                is APK.Restore -> Unit
-            }
+        handleAPK(subject)
+        remove(id)
+        when (subject.configuration)  {
+            is APK.Upgrade -> APKInstall.install(this, subject.file)
+            is APK.Restore -> Unit
         }
     }
 
@@ -85,14 +78,14 @@ open class DownloadService : RemoteFileService() {
 
     override fun Notification.Builder.addActions(subject: DownloadSubject)
     = when (subject) {
-        is Magisk -> addActionsInternal(subject)
-        is Module -> addActionsInternal(subject)
-        is Manager -> addActionsInternal(subject)
+        is Magisk -> addActions(subject)
+        is Module -> addActions(subject)
+        is Manager -> addActions(subject)
     }
 
-    private fun Notification.Builder.addActionsInternal(subject: Magisk)
+    private fun Notification.Builder.addActions(subject: Magisk)
     = when (val conf = subject.configuration) {
-        Download -> this.apply {
+        Download -> apply {
             fileIntent(subject.file.parentFile!!)
                 .takeIf { it.exists(get()) }
                 ?.let { addAction(0, R.string.download_open_parent, it.chooser()) }
@@ -101,18 +94,12 @@ open class DownloadService : RemoteFileService() {
                 ?.let { addAction(0, R.string.download_open_self, it.chooser()) }
         }
         Uninstall -> setContentIntent(FlashFragment.uninstallIntent(context, subject.file))
-        is Flash -> setContentIntent(
-            FlashFragment.flashIntent(
-                context,
-                subject.file,
-                conf is Secondary
-            )
-        )
+        is Flash -> setContentIntent(FlashFragment.flashIntent(context, subject.file, conf is Secondary))
         is Patch -> setContentIntent(FlashFragment.patchIntent(context, subject.file, conf.fileUri))
         else -> this
     }
 
-    private fun Notification.Builder.addActionsInternal(subject: Module)
+    private fun Notification.Builder.addActions(subject: Module)
     = when (subject.configuration) {
         Download -> this.apply {
             fileIntent(subject.file.parentFile!!)
@@ -126,7 +113,7 @@ open class DownloadService : RemoteFileService() {
         else -> this
     }
 
-    private fun Notification.Builder.addActionsInternal(subject: Manager)
+    private fun Notification.Builder.addActions(subject: Manager)
     = when (subject.configuration) {
         APK.Upgrade -> setContentIntent(APKInstall.installIntent(context, subject.file))
         else -> this
diff --git a/app/src/main/java/com/topjohnwu/magisk/core/download/ManagerUpgrade.kt b/app/src/main/java/com/topjohnwu/magisk/core/download/ManagerUpgrade.kt
index f3c2ecff9..4431225f3 100644
--- a/app/src/main/java/com/topjohnwu/magisk/core/download/ManagerUpgrade.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/core/download/ManagerUpgrade.kt
@@ -32,14 +32,14 @@ private fun RemoteFileService.patch(apk: File, id: Int) {
     patched.renameTo(apk)
 }
 
-private fun RemoteFileService.upgrade(apk: File, id: Int) {
+private suspend fun RemoteFileService.upgrade(apk: File, id: Int) {
     if (isRunningAsStub) {
         // Move to upgrade location
         apk.copyTo(DynAPK.update(this), overwrite = true)
         apk.delete()
         if (Info.stub!!.version < Info.remote.stub.versionCode) {
             // We also want to upgrade stub
-            service.fetchFile(Info.remote.stub.link).blockingGet().byteStream().use {
+            service.fetchFile(Info.remote.stub.link).byteStream().use {
                 it.writeTo(apk)
             }
             patch(apk, id)
@@ -65,7 +65,7 @@ private fun RemoteFileService.restore(apk: File, id: Int) {
     Shell.su("pm install $apk && pm uninstall $packageName").exec()
 }
 
-fun RemoteFileService.handleAPK(subject: DownloadSubject.Manager) =
+suspend fun RemoteFileService.handleAPK(subject: DownloadSubject.Manager) =
     when (subject.configuration) {
         is Upgrade -> upgrade(subject.file, subject.hashCode())
         is Restore -> restore(subject.file, subject.hashCode())
diff --git a/app/src/main/java/com/topjohnwu/magisk/core/download/NotificationService.kt b/app/src/main/java/com/topjohnwu/magisk/core/download/NotificationService.kt
index c6fb94432..03c02c479 100644
--- a/app/src/main/java/com/topjohnwu/magisk/core/download/NotificationService.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/core/download/NotificationService.kt
@@ -5,6 +5,9 @@ import android.content.Intent
 import android.os.IBinder
 import com.topjohnwu.magisk.core.base.BaseService
 import com.topjohnwu.magisk.core.view.Notifications
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.cancel
 import org.koin.core.KoinComponent
 import java.util.*
 import kotlin.collections.HashMap
@@ -16,12 +19,19 @@ abstract class NotificationService : BaseService(), KoinComponent {
 
     private val notifications = Collections.synchronizedMap(HashMap<Int, Notification.Builder>())
 
+    val coroutineScope = CoroutineScope(Dispatchers.IO)
+
     override fun onTaskRemoved(rootIntent: Intent?) {
         super.onTaskRemoved(rootIntent)
         notifications.forEach { cancel(it.key) }
         notifications.clear()
     }
 
+    override fun onDestroy() {
+        super.onDestroy()
+        coroutineScope.cancel()
+    }
+
     abstract fun createNotification(): Notification.Builder
 
     // --
diff --git a/app/src/main/java/com/topjohnwu/magisk/core/download/RemoteFileService.kt b/app/src/main/java/com/topjohnwu/magisk/core/download/RemoteFileService.kt
index 4cd8df26e..66b5d504b 100644
--- a/app/src/main/java/com/topjohnwu/magisk/core/download/RemoteFileService.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/core/download/RemoteFileService.kt
@@ -9,17 +9,17 @@ import com.topjohnwu.magisk.core.ForegroundTracker
 import com.topjohnwu.magisk.core.utils.ProgressInputStream
 import com.topjohnwu.magisk.core.view.Notifications
 import com.topjohnwu.magisk.data.network.GithubRawServices
-import com.topjohnwu.magisk.extensions.subscribeK
 import com.topjohnwu.magisk.extensions.writeTo
 import com.topjohnwu.magisk.model.entity.internal.DownloadSubject
 import com.topjohnwu.magisk.model.entity.internal.DownloadSubject.Magisk
 import com.topjohnwu.magisk.model.entity.internal.DownloadSubject.Module
 import com.topjohnwu.superuser.ShellUtils
-import io.reactivex.Completable
+import kotlinx.coroutines.launch
 import okhttp3.ResponseBody
 import org.koin.android.ext.android.inject
 import org.koin.core.KoinComponent
 import timber.log.Timber
+import java.io.IOException
 import java.io.InputStream
 
 abstract class RemoteFileService : NotificationService() {
@@ -29,7 +29,14 @@ abstract class RemoteFileService : NotificationService() {
     override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
         intent?.getParcelableExtra<DownloadSubject>(ARG_URL)?.let {
             update(it.hashCode())
-            start(it)
+            coroutineScope.launch {
+                try {
+                    start(it)
+                } catch (e: IOException) {
+                    Timber.e(e)
+                    failNotify(it)
+                }
+            }
         }
         return START_REDELIVER_INTENT
     }
@@ -38,37 +45,24 @@ abstract class RemoteFileService : NotificationService() {
 
     // ---
 
-    private fun start(subject: DownloadSubject) = checkExisting(subject)
-        .onErrorResumeNext { download(subject) }
-        .subscribeK(onError = {
-            Timber.e(it)
-            failNotify(subject)
-        }) {
-            val newId = finishNotify(subject)
-            if (ForegroundTracker.hasForeground) {
-                onFinished(subject, newId)
+    private suspend fun start(subject: DownloadSubject) {
+        if (subject !is Magisk ||
+            !subject.file.exists() ||
+            !ShellUtils.checkSum("MD5", subject.file, subject.magisk.md5)) {
+            val stream = service.fetchFile(subject.url).toProgressStream(subject)
+            when (subject) {
+                is Module ->
+                    stream.toModule(subject.file, service.fetchInstaller().byteStream())
+                else ->
+                    stream.writeTo(subject.file)
             }
         }
-
-    private fun checkExisting(subject: DownloadSubject) = Completable.fromAction {
-        check(subject is Magisk) { "Download cache is disabled" }
-        check(subject.file.exists() &&
-                ShellUtils.checkSum("MD5", subject.file, subject.magisk.md5)) {
-            "The given file does not match checksum"
+        val newId = finishNotify(subject)
+        if (ForegroundTracker.hasForeground) {
+            onFinished(subject, newId)
         }
     }
 
-    private fun download(subject: DownloadSubject) = service.fetchFile(subject.url)
-        .map { it.toProgressStream(subject) }
-        .flatMapCompletable { stream ->
-            when (subject) {
-                is Module -> service.fetchInstaller()
-                    .doOnSuccess { stream.toModule(subject.file, it.byteStream()) }
-                    .ignoreElement()
-                else -> Completable.fromAction { stream.writeTo(subject.file) }
-            }
-        }
-
     private fun ResponseBody.toProgressStream(subject: DownloadSubject): InputStream {
         val maxRaw = contentLength()
         val max = maxRaw / 1_000_000f
@@ -112,8 +106,7 @@ abstract class RemoteFileService : NotificationService() {
     // ---
 
 
-    @Throws(Throwable::class)
-    protected abstract fun onFinished(subject: DownloadSubject, id: Int)
+    protected abstract suspend fun onFinished(subject: DownloadSubject, id: Int)
 
     protected abstract fun Notification.Builder.addActions(subject: DownloadSubject)
             : Notification.Builder
diff --git a/app/src/main/java/com/topjohnwu/magisk/core/model/module/Repo.kt b/app/src/main/java/com/topjohnwu/magisk/core/model/module/Repo.kt
index d42d3c513..04e6e097c 100644
--- a/app/src/main/java/com/topjohnwu/magisk/core/model/module/Repo.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/core/model/module/Repo.kt
@@ -31,7 +31,7 @@ data class Repo(
 
     val downloadFilename: String get() = "$name-$version($versionCode).zip".legalFilename()
 
-    val readme get() = stringRepo.getReadme(this)
+    suspend fun readme() = stringRepo.getReadme(this)
 
     val zipUrl: String get() = Const.Url.ZIP_URL.format(id)
 
diff --git a/app/src/main/java/com/topjohnwu/magisk/core/tasks/MagiskInstaller.kt b/app/src/main/java/com/topjohnwu/magisk/core/tasks/MagiskInstaller.kt
index 9290195c4..e1f2254e3 100644
--- a/app/src/main/java/com/topjohnwu/magisk/core/tasks/MagiskInstaller.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/core/tasks/MagiskInstaller.kt
@@ -15,7 +15,9 @@ import com.topjohnwu.magisk.core.Info
 import com.topjohnwu.magisk.core.utils.Utils
 import com.topjohnwu.magisk.data.network.GithubRawServices
 import com.topjohnwu.magisk.di.Protected
-import com.topjohnwu.magisk.extensions.*
+import com.topjohnwu.magisk.extensions.readUri
+import com.topjohnwu.magisk.extensions.reboot
+import com.topjohnwu.magisk.extensions.withStreams
 import com.topjohnwu.magisk.model.events.dialog.EnvFixDialog
 import com.topjohnwu.signing.SignBoot
 import com.topjohnwu.superuser.Shell
@@ -322,7 +324,7 @@ abstract class MagiskInstallImpl : KoinComponent {
                 tarOut = null
                 it
             } ?: destFile.outputStream()
-            patched.suInputStream().use { it.copyTo(os); os.close() }
+            SuFileInputStream(patched).use { it.copyTo(os); os.close() }
         } catch (e: IOException) {
             console.add("! Failed to output to $destFile")
             Timber.e(e)
@@ -338,10 +340,10 @@ abstract class MagiskInstallImpl : KoinComponent {
         return true
     }
 
-    private fun postOTA(): Boolean {
+    private suspend fun postOTA(): Boolean {
         val bootctl = SuFile("/data/adb/bootctl")
         try {
-            withStreams(service.fetchBootctl().blockingGet().byteStream(), bootctl.suOutputStream()) {
+            withStreams(service.fetchBootctl().byteStream(), SuFileOutputStream(bootctl)) {
                 input, out -> input.copyTo(out)
             }
         } catch (e: IOException) {
@@ -368,7 +370,7 @@ abstract class MagiskInstallImpl : KoinComponent {
 
     protected fun direct() = findImage() && extractZip() && patchBoot() && flashBoot()
 
-    protected fun secondSlot() =
+    protected suspend fun secondSlot() =
         findSecondaryImage() && extractZip() && patchBoot() && flashBoot() && postOTA()
 
     protected fun fixEnv(zip: File): Boolean {
@@ -379,7 +381,7 @@ abstract class MagiskInstallImpl : KoinComponent {
     }
 
     @WorkerThread
-    protected abstract fun operations(): Boolean
+    protected abstract suspend fun operations(): Boolean
 
     open suspend fun exec() = withContext(Dispatchers.IO) { operations() }
 }
@@ -407,7 +409,7 @@ sealed class MagiskInstaller(
         console: MutableList<String>,
         logs: MutableList<String>
     ) : MagiskInstaller(file, console, logs) {
-        override fun operations() = doPatchFile(uri)
+        override suspend fun operations() = doPatchFile(uri)
     }
 
     class SecondSlot(
@@ -415,7 +417,7 @@ sealed class MagiskInstaller(
         console: MutableList<String>,
         logs: MutableList<String>
     ) : MagiskInstaller(file, console, logs) {
-        override fun operations() = secondSlot()
+        override suspend fun operations() = secondSlot()
     }
 
     class Direct(
@@ -423,7 +425,7 @@ sealed class MagiskInstaller(
         console: MutableList<String>,
         logs: MutableList<String>
     ) : MagiskInstaller(file, console, logs) {
-        override fun operations() = direct()
+        override suspend fun operations() = direct()
     }
 
 }
@@ -431,7 +433,7 @@ sealed class MagiskInstaller(
 class EnvFixTask(
     private val zip: File
 ) : MagiskInstallImpl() {
-    override fun operations() = fixEnv(zip)
+    override suspend fun operations() = fixEnv(zip)
 
     override suspend fun exec(): Boolean {
         val success = super.exec()
diff --git a/app/src/main/java/com/topjohnwu/magisk/core/utils/Locales.kt b/app/src/main/java/com/topjohnwu/magisk/core/utils/Locales.kt
index b98813ccd..e34df967b 100644
--- a/app/src/main/java/com/topjohnwu/magisk/core/utils/Locales.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/core/utils/Locales.kt
@@ -13,7 +13,8 @@ import com.topjohnwu.magisk.core.ResMgr
 import com.topjohnwu.magisk.core.addAssetPath
 import com.topjohnwu.magisk.extensions.langTagToLocale
 import com.topjohnwu.magisk.extensions.toLangTag
-import io.reactivex.Single
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
 import java.util.*
 import kotlin.Comparator
 import kotlin.collections.ArrayList
@@ -23,7 +24,10 @@ var currentLocale: Locale = Locale.getDefault()
 @SuppressLint("ConstantLocale")
 val defaultLocale: Locale = Locale.getDefault()
 
-val availableLocales = Single.fromCallable {
+private var cachedLocales: Pair<Array<String>, Array<String>>? = null
+
+suspend fun availableLocales() = cachedLocales ?:
+withContext(Dispatchers.Default) {
     val compareId = R.string.app_changelog
 
     // Create a completely new resource to prevent cross talk over app's configs
@@ -56,8 +60,6 @@ val availableLocales = Single.fromCallable {
     res.updateConfiguration(config, metrics)
     val defName = res.getString(R.string.system_default)
 
-    Pair(locales, defName)
-}.map { (locales, defName) ->
     val names = ArrayList<String>(locales.size + 1)
     val values = ArrayList<String>(locales.size + 1)
 
@@ -69,8 +71,8 @@ val availableLocales = Single.fromCallable {
         values.add(locale.toLangTag())
     }
 
-    Pair(names.toTypedArray(), values.toTypedArray())
-}.cache()!!
+    (names.toTypedArray() to values.toTypedArray()).also { cachedLocales = it }
+}
 
 fun Resources.updateConfig(config: Configuration = configuration) {
     config.setLocale(currentLocale)
diff --git a/app/src/main/java/com/topjohnwu/magisk/core/utils/PatchAPK.kt b/app/src/main/java/com/topjohnwu/magisk/core/utils/PatchAPK.kt
index 9e6e033fd..a9658f5a1 100644
--- a/app/src/main/java/com/topjohnwu/magisk/core/utils/PatchAPK.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/core/utils/PatchAPK.kt
@@ -11,15 +11,18 @@ import com.topjohnwu.magisk.core.isRunningAsStub
 import com.topjohnwu.magisk.core.view.Notifications
 import com.topjohnwu.magisk.data.network.GithubRawServices
 import com.topjohnwu.magisk.extensions.get
-import com.topjohnwu.magisk.extensions.subscribeK
 import com.topjohnwu.magisk.extensions.writeTo
 import com.topjohnwu.signing.JarMap
 import com.topjohnwu.signing.SignAPK
 import com.topjohnwu.superuser.Shell
-import io.reactivex.Single
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
 import timber.log.Timber
 import java.io.File
 import java.io.FileOutputStream
+import java.io.IOException
 import java.nio.ByteBuffer
 import java.nio.ByteOrder
 import java.security.SecureRandom
@@ -102,16 +105,16 @@ object PatchAPK {
         return true
     }
 
-    private fun patchAndHide(context: Context, label: String): Boolean {
+    private suspend fun patchAndHide(context: Context, label: String): Boolean {
         val dlStub = !isRunningAsStub && SDK_INT >= 28 && Const.Version.atLeast_20_2()
         val src = if (dlStub) {
             val stub = File(context.cacheDir, "stub.apk")
             val svc = get<GithubRawServices>()
             try {
-                svc.fetchFile(Info.remote.stub.link).blockingGet().byteStream().use {
+                svc.fetchFile(Info.remote.stub.link).byteStream().use {
                     it.writeTo(stub)
                 }
-            } catch (e: Exception) {
+            } catch (e: IOException) {
                 Timber.e(e)
                 return false
             }
@@ -143,10 +146,11 @@ object PatchAPK {
     fun hideManager(context: Context, label: String) {
         val progress = Notifications.progress(context, context.getString(R.string.hide_manager_title))
         Notifications.mgr.notify(Const.ID.HIDE_MANAGER_NOTIFICATION_ID, progress.build())
-        Single.fromCallable {
-            patchAndHide(context, label)
-        }.subscribeK {
-            if (!it)
+        GlobalScope.launch {
+            val result = withContext(Dispatchers.IO) {
+                patchAndHide(context, label)
+            }
+            if (!result)
                 Utils.toast(R.string.hide_manager_fail_toast, Toast.LENGTH_LONG)
             Notifications.mgr.cancel(Const.ID.HIDE_MANAGER_NOTIFICATION_ID)
         }
diff --git a/app/src/main/java/com/topjohnwu/magisk/data/database/RepoDao.kt b/app/src/main/java/com/topjohnwu/magisk/data/database/RepoDao.kt
index 2df1fdf88..23953ad9b 100644
--- a/app/src/main/java/com/topjohnwu/magisk/data/database/RepoDao.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/data/database/RepoDao.kt
@@ -3,6 +3,8 @@ package com.topjohnwu.magisk.data.database
 import androidx.room.*
 import com.topjohnwu.magisk.core.Config
 import com.topjohnwu.magisk.core.model.module.Repo
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
 
 @Database(version = 6, entities = [Repo::class, RepoEtag::class], exportSchema = false)
 abstract class RepoDatabase : RoomDatabase() {
@@ -26,7 +28,7 @@ abstract class RepoDao(private val db: RepoDatabase) {
         set(value) = addEtagRaw(RepoEtag(0, value))
         get() = etagRaw()?.key.orEmpty()
 
-    fun clear() = db.clearAllTables()
+    suspend fun clear() = withContext(Dispatchers.IO) { db.clearAllTables() }
 
     @Query("SELECT * FROM repos ORDER BY last_update DESC")
     protected abstract fun getReposDateOrder(): List<Repo>
diff --git a/app/src/main/java/com/topjohnwu/magisk/data/network/GithubServices.kt b/app/src/main/java/com/topjohnwu/magisk/data/network/GithubServices.kt
index 2049bcaa6..38a84ff2e 100644
--- a/app/src/main/java/com/topjohnwu/magisk/data/network/GithubServices.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/data/network/GithubServices.kt
@@ -3,7 +3,6 @@ package com.topjohnwu.magisk.data.network
 import com.topjohnwu.magisk.core.Const
 import com.topjohnwu.magisk.core.model.UpdateInfo
 import com.topjohnwu.magisk.core.tasks.GithubRepoInfo
-import io.reactivex.Single
 import okhttp3.ResponseBody
 import retrofit2.Response
 import retrofit2.http.*
@@ -26,18 +25,15 @@ interface GithubRawServices {
 
     @GET("$MAGISK_FILES/{$REVISION}/snet.jar")
     @Streaming
-    fun fetchSafetynet(@Path(REVISION) revision: String = Const.SNET_REVISION): Single<ResponseBody>
+    suspend fun fetchSafetynet(@Path(REVISION) revision: String = Const.SNET_REVISION): ResponseBody
 
     @GET("$MAGISK_FILES/{$REVISION}/bootctl")
     @Streaming
-    fun fetchBootctl(@Path(REVISION) revision: String = Const.BOOTCTL_REVISION): Single<ResponseBody>
+    suspend fun fetchBootctl(@Path(REVISION) revision: String = Const.BOOTCTL_REVISION): ResponseBody
 
     @GET("$MAGISK_MASTER/scripts/module_installer.sh")
     @Streaming
-    fun fetchInstaller(): Single<ResponseBody>
-
-    @GET("$MAGISK_MODULES/{$MODULE}/master/{$FILE}")
-    fun fetchModuleInfo(@Path(MODULE) id: String, @Path(FILE) file: String): Single<String>
+    suspend fun fetchInstaller(): ResponseBody
 
     @GET("$MAGISK_MODULES/{$MODULE}/master/{$FILE}")
     suspend fun fetchModuleFile(@Path(MODULE) id: String, @Path(FILE) file: String): String
@@ -50,10 +46,10 @@ interface GithubRawServices {
      * */
     @GET
     @Streaming
-    fun fetchFile(@Url url: String): Single<ResponseBody>
+    suspend fun fetchFile(@Url url: String): ResponseBody
 
     @GET
-    fun fetchString(@Url url: String): Single<String>
+    suspend fun fetchString(@Url url: String): String
 
 
     companion object {
diff --git a/app/src/main/java/com/topjohnwu/magisk/data/repository/MagiskRepository.kt b/app/src/main/java/com/topjohnwu/magisk/data/repository/MagiskRepository.kt
index d9a300c6b..6936e38d5 100644
--- a/app/src/main/java/com/topjohnwu/magisk/data/repository/MagiskRepository.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/data/repository/MagiskRepository.kt
@@ -20,8 +20,6 @@ class MagiskRepository(
     private val packageManager: PackageManager
 ) {
 
-    fun fetchSafetynet() = apiRaw.fetchSafetynet()
-
     suspend fun fetchUpdate() = try {
         var info = when (Config.updateChannel) {
             Config.Value.DEFAULT_CHANNEL, Config.Value.STABLE_CHANNEL -> apiRaw.fetchStableUpdate()
diff --git a/app/src/main/java/com/topjohnwu/magisk/data/repository/StringRepository.kt b/app/src/main/java/com/topjohnwu/magisk/data/repository/StringRepository.kt
index fb807fe5b..e7889ef59 100644
--- a/app/src/main/java/com/topjohnwu/magisk/data/repository/StringRepository.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/data/repository/StringRepository.kt
@@ -7,9 +7,10 @@ class StringRepository(
     private val api: GithubRawServices
 ) {
 
-    fun getString(url: String) = api.fetchString(url)
+    suspend fun getString(url: String) = api.fetchString(url)
 
     suspend fun getMetadata(repo: Repo) = api.fetchModuleFile(repo.id, "module.prop")
 
-    fun getReadme(repo: Repo) = api.fetchModuleInfo(repo.id, "README.md")
+    suspend fun getReadme(repo: Repo) = api.fetchModuleFile(repo.id, "README.md")
+
 }
diff --git a/app/src/main/java/com/topjohnwu/magisk/databinding/AdaptersGeneric.kt b/app/src/main/java/com/topjohnwu/magisk/databinding/AdaptersGeneric.kt
index f845545b2..61fcb7e10 100644
--- a/app/src/main/java/com/topjohnwu/magisk/databinding/AdaptersGeneric.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/databinding/AdaptersGeneric.kt
@@ -7,8 +7,11 @@ import androidx.core.view.isGone
 import androidx.core.view.isInvisible
 import androidx.core.widget.TextViewCompat
 import androidx.databinding.BindingAdapter
-import com.topjohnwu.magisk.extensions.subscribeK
-import io.reactivex.Single
+import com.topjohnwu.magisk.extensions.get
+import io.noties.markwon.Markwon
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.launch
 
 @BindingAdapter("gone")
 fun setGone(view: View, gone: Boolean) {
@@ -32,9 +35,16 @@ fun setInvisibleUnless(view: View, invisibleUnless: Boolean) {
 
 @BindingAdapter("precomputedText")
 fun setPrecomputedText(tv: TextView, text: CharSequence) {
-    Single.fromCallable {
-        PrecomputedTextCompat.create(text, TextViewCompat.getTextMetricsParams(tv))
-    }.subscribeK {
-        TextViewCompat.setPrecomputedText(tv, it);
+    GlobalScope.launch(Dispatchers.Default) {
+        val pre = PrecomputedTextCompat.create(text, TextViewCompat.getTextMetricsParams(tv))
+        tv.post {
+            TextViewCompat.setPrecomputedText(tv, pre);
+        }
     }
 }
+
+@BindingAdapter("markdownText")
+fun setMarkdownText(tv: TextView, text: CharSequence) {
+    val markwon = get<Markwon>()
+    markwon.setMarkdown(tv, text.toString())
+}
diff --git a/app/src/main/java/com/topjohnwu/magisk/di/NetworkingModule.kt b/app/src/main/java/com/topjohnwu/magisk/di/NetworkingModule.kt
index 62ab2dd24..791b35bbf 100644
--- a/app/src/main/java/com/topjohnwu/magisk/di/NetworkingModule.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/di/NetworkingModule.kt
@@ -7,6 +7,7 @@ import com.topjohnwu.magisk.data.network.GithubApiServices
 import com.topjohnwu.magisk.data.network.GithubRawServices
 import com.topjohnwu.magisk.net.Networking
 import com.topjohnwu.magisk.net.NoSSLv3SocketFactory
+import com.topjohnwu.magisk.view.PrecomputedTextSetter
 import io.noties.markwon.Markwon
 import io.noties.markwon.html.HtmlPlugin
 import io.noties.markwon.image.ImagesPlugin
@@ -93,6 +94,7 @@ inline fun <reified T> createApiService(retrofitBuilder: Retrofit.Builder, baseU
 
 fun createMarkwon(context: Context, okHttpClient: OkHttpClient): Markwon {
     return Markwon.builder(context)
+        .textSetter(PrecomputedTextSetter())
         .usePlugin(HtmlPlugin.create())
         .usePlugin(ImagesPlugin.create {
             it.addSchemeHandler(OkHttpNetworkSchemeHandler.create(okHttpClient))
diff --git a/app/src/main/java/com/topjohnwu/magisk/di/ViewModelsModule.kt b/app/src/main/java/com/topjohnwu/magisk/di/ViewModelsModule.kt
index 05d28d79a..59c3ed3b5 100644
--- a/app/src/main/java/com/topjohnwu/magisk/di/ViewModelsModule.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/di/ViewModelsModule.kt
@@ -25,7 +25,7 @@ val viewModelModules = module {
     viewModel { SettingsViewModel(get()) }
     viewModel { SuperuserViewModel(get(), get(), get()) }
     viewModel { ThemeViewModel() }
-    viewModel { InstallViewModel(get(), get()) }
+    viewModel { InstallViewModel(get()) }
     viewModel { MainViewModel() }
 
     // Legacy
diff --git a/app/src/main/java/com/topjohnwu/magisk/extensions/RxJava.kt b/app/src/main/java/com/topjohnwu/magisk/extensions/RxJava.kt
index 962ccb402..d2f0a333d 100644
--- a/app/src/main/java/com/topjohnwu/magisk/extensions/RxJava.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/extensions/RxJava.kt
@@ -1,39 +1,15 @@
 package com.topjohnwu.magisk.extensions
 
-import androidx.databinding.ObservableField
-import com.topjohnwu.superuser.internal.UiThreadHandler
-import io.reactivex.*
+import io.reactivex.Observable
+import io.reactivex.Scheduler
 import io.reactivex.android.schedulers.AndroidSchedulers
-import io.reactivex.disposables.Disposables
-import io.reactivex.functions.BiFunction
 import io.reactivex.schedulers.Schedulers
-import androidx.databinding.Observable as BindingObservable
 
 fun <T> Observable<T>.applySchedulers(
     subscribeOn: Scheduler = Schedulers.io(),
     observeOn: Scheduler = AndroidSchedulers.mainThread()
 ): Observable<T> = this.subscribeOn(subscribeOn).observeOn(observeOn)
 
-fun <T> Flowable<T>.applySchedulers(
-    subscribeOn: Scheduler = Schedulers.io(),
-    observeOn: Scheduler = AndroidSchedulers.mainThread()
-): Flowable<T> = this.subscribeOn(subscribeOn).observeOn(observeOn)
-
-fun <T> Single<T>.applySchedulers(
-    subscribeOn: Scheduler = Schedulers.io(),
-    observeOn: Scheduler = AndroidSchedulers.mainThread()
-): Single<T> = this.subscribeOn(subscribeOn).observeOn(observeOn)
-
-fun <T> Maybe<T>.applySchedulers(
-    subscribeOn: Scheduler = Schedulers.io(),
-    observeOn: Scheduler = AndroidSchedulers.mainThread()
-): Maybe<T> = this.subscribeOn(subscribeOn).observeOn(observeOn)
-
-fun Completable.applySchedulers(
-    subscribeOn: Scheduler = Schedulers.io(),
-    observeOn: Scheduler = AndroidSchedulers.mainThread()
-): Completable = this.subscribeOn(subscribeOn).observeOn(observeOn)
-
 /*=== ALIASES FOR OBSERVABLES ===*/
 
 typealias OnCompleteListener = () -> Unit
@@ -49,128 +25,3 @@ fun <T> Observable<T>.subscribeK(
 ) = applySchedulers()
     .subscribe(onNext, onError, onComplete)
 
-fun <T> Single<T>.subscribeK(
-    onError: OnErrorListener = { it.printStackTrace() },
-    onNext: OnSuccessListener<T> = {}
-) = applySchedulers()
-    .subscribe(onNext, onError)
-
-fun <T> Maybe<T>.subscribeK(
-    onError: OnErrorListener = { it.printStackTrace() },
-    onComplete: OnCompleteListener = {},
-    onSuccess: OnSuccessListener<T> = {}
-) = applySchedulers()
-    .subscribe(onSuccess, onError, onComplete)
-
-fun <T> Flowable<T>.subscribeK(
-    onError: OnErrorListener = { it.printStackTrace() },
-    onComplete: OnCompleteListener = {},
-    onNext: OnSuccessListener<T> = {}
-) = applySchedulers()
-    .subscribe(onNext, onError, onComplete)
-
-fun Completable.subscribeK(
-    onError: OnErrorListener = { it.printStackTrace() },
-    onComplete: OnCompleteListener = {}
-) = applySchedulers()
-    .subscribe(onComplete, onError)
-
-fun <T> Observable<T>.doOnSubscribeUi(body: () -> Unit) =
-    doOnSubscribe { UiThreadHandler.run { body() } }
-
-fun <T> Single<T>.doOnSubscribeUi(body: () -> Unit) =
-    doOnSubscribe { UiThreadHandler.run { body() } }
-
-fun <T> Maybe<T>.doOnSubscribeUi(body: () -> Unit) =
-    doOnSubscribe { UiThreadHandler.run { body() } }
-
-fun <T> Flowable<T>.doOnSubscribeUi(body: () -> Unit) =
-    doOnSubscribe { UiThreadHandler.run { body() } }
-
-fun Completable.doOnSubscribeUi(body: () -> Unit) =
-    doOnSubscribe { UiThreadHandler.run { body() } }
-
-
-fun <T> Observable<T>.doOnErrorUi(body: (Throwable) -> Unit) =
-    doOnError { UiThreadHandler.run { body(it) } }
-
-fun <T> Single<T>.doOnErrorUi(body: (Throwable) -> Unit) =
-    doOnError { UiThreadHandler.run { body(it) } }
-
-fun <T> Maybe<T>.doOnErrorUi(body: (Throwable) -> Unit) =
-    doOnError { UiThreadHandler.run { body(it) } }
-
-fun <T> Flowable<T>.doOnErrorUi(body: (Throwable) -> Unit) =
-    doOnError { UiThreadHandler.run { body(it) } }
-
-fun Completable.doOnErrorUi(body: (Throwable) -> Unit) =
-    doOnError { UiThreadHandler.run { body(it) } }
-
-
-fun <T> Observable<T>.doOnNextUi(body: (T) -> Unit) =
-    doOnNext { UiThreadHandler.run { body(it) } }
-
-fun <T> Flowable<T>.doOnNextUi(body: (T) -> Unit) =
-    doOnNext { UiThreadHandler.run { body(it) } }
-
-fun <T> Single<T>.doOnSuccessUi(body: (T) -> Unit) =
-    doOnSuccess { UiThreadHandler.run { body(it) } }
-
-fun <T> Maybe<T>.doOnSuccessUi(body: (T) -> Unit) =
-    doOnSuccess { UiThreadHandler.run { body(it) } }
-
-fun <T> Maybe<T>.doOnCompleteUi(body: () -> Unit) =
-    doOnComplete { UiThreadHandler.run { body() } }
-
-fun Completable.doOnCompleteUi(body: () -> Unit) =
-    doOnComplete { UiThreadHandler.run { body() } }
-
-
-fun <T, R> Observable<List<T>>.mapList(
-    transformer: (T) -> R
-) = flatMapIterable { it }
-    .map(transformer)
-    .toList()
-
-fun <T, R> Single<List<T>>.mapList(
-    transformer: (T) -> R
-) = flattenAsFlowable { it }
-    .map(transformer)
-    .toList()
-
-fun <T, R> Maybe<List<T>>.mapList(
-    transformer: (T) -> R
-) = flattenAsFlowable { it }
-    .map(transformer)
-    .toList()
-
-fun <T, R> Flowable<List<T>>.mapList(
-    transformer: (T) -> R
-) = flatMapIterable { it }
-    .map(transformer)
-    .toList()
-
-fun <T> ObservableField<T>.toObservable(): Observable<T> {
-    val observableField = this
-    return Observable.create { emitter ->
-        observableField.get()?.let { emitter.onNext(it) }
-
-        val callback = object : BindingObservable.OnPropertyChangedCallback() {
-            override fun onPropertyChanged(sender: BindingObservable?, propertyId: Int) {
-                observableField.get()?.let { emitter.onNext(it) }
-            }
-        }
-        observableField.addOnPropertyChangedCallback(callback)
-        emitter.setDisposable(Disposables.fromAction {
-            observableField.removeOnPropertyChangedCallback(callback)
-        })
-    }
-}
-
-fun <T : Any> T.toSingle() = Single.just(this)
-
-inline fun <T1, T2, R> zip(
-    t1: Single<T1>,
-    t2: Single<T2>,
-    crossinline zipper: (T1, T2) -> R
-) = Single.zip(t1, t2, BiFunction<T1, T2, R> { rt1, rt2 -> zipper(rt1, rt2) })
diff --git a/app/src/main/java/com/topjohnwu/magisk/extensions/XList.kt b/app/src/main/java/com/topjohnwu/magisk/extensions/XList.kt
index 88e5807c1..6dc6812d7 100644
--- a/app/src/main/java/com/topjohnwu/magisk/extensions/XList.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/extensions/XList.kt
@@ -3,7 +3,7 @@ package com.topjohnwu.magisk.extensions
 import androidx.collection.SparseArrayCompat
 import androidx.databinding.ObservableList
 import com.topjohnwu.magisk.utils.DiffObservableList
-import io.reactivex.disposables.Disposable
+import kotlinx.coroutines.*
 
 fun <T> MutableList<T>.update(newList: List<T>) {
     clear()
@@ -25,8 +25,9 @@ fun List<String>.toShellCmd(): String {
 }
 
 fun <T1, T2> ObservableList<T1>.sendUpdatesTo(
-        target: DiffObservableList<T2>,
-        mapper: (List<T1>) -> List<T2>
+    target: DiffObservableList<T2>,
+    scope: CoroutineScope,
+    mapper: (List<T1>) -> List<T2>
 ) = addOnListChangedCallback(object :
     ObservableList.OnListChangedCallback<ObservableList<T1>>() {
     override fun onChanged(sender: ObservableList<T1>?) {
@@ -49,14 +50,17 @@ fun <T1, T2> ObservableList<T1>.sendUpdatesTo(
         updateAsync(sender ?: return)
     }
 
-    private var updater: Disposable? = null
+    private var updater: Job? = null
 
     private fun updateAsync(sender: List<T1>) {
-        updater?.dispose()
-        updater = sender.toSingle()
-            .map { mapper(it) }
-            .map { it to target.calculateDiff(it) }
-            .subscribeK { target.update(it.first, it.second) }
+        updater?.cancel()
+        updater = scope.launch {
+            val (list, diff) = withContext(Dispatchers.Default) {
+                val list = mapper(sender)
+                list to target.calculateDiff(list)
+            }
+            target.update(list, diff)
+        }
     }
 })
 
diff --git a/app/src/main/java/com/topjohnwu/magisk/extensions/XSU.kt b/app/src/main/java/com/topjohnwu/magisk/extensions/XSU.kt
index b6cce5211..236cc2bc4 100644
--- a/app/src/main/java/com/topjohnwu/magisk/extensions/XSU.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/extensions/XSU.kt
@@ -2,19 +2,11 @@ package com.topjohnwu.magisk.extensions
 
 import com.topjohnwu.magisk.core.Info
 import com.topjohnwu.superuser.Shell
-import com.topjohnwu.superuser.io.SuFileInputStream
-import com.topjohnwu.superuser.io.SuFileOutputStream
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
-import java.io.File
 
 fun reboot(reason: String = if (Info.recovery) "recovery" else "") {
     Shell.su("/system/bin/svc power reboot $reason || /system/bin/reboot $reason").submit()
 }
 
-fun File.suOutputStream() = SuFileOutputStream(this)
-fun File.suInputStream() = SuFileInputStream(this)
-
-val hasRoot get() = Shell.rootAccess()
-
 suspend fun Shell.Job.await() = withContext(Dispatchers.IO) { exec() }
diff --git a/app/src/main/java/com/topjohnwu/magisk/model/events/ViewEvents.kt b/app/src/main/java/com/topjohnwu/magisk/model/events/ViewEvents.kt
index b15f68eac..cb5825c2d 100644
--- a/app/src/main/java/com/topjohnwu/magisk/model/events/ViewEvents.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/model/events/ViewEvents.kt
@@ -8,23 +8,22 @@ import com.topjohnwu.magisk.core.Const
 import com.topjohnwu.magisk.core.base.BaseActivity
 import com.topjohnwu.magisk.core.model.module.Repo
 import com.topjohnwu.magisk.core.utils.SafetyNetHelper
-import com.topjohnwu.magisk.data.repository.MagiskRepository
+import com.topjohnwu.magisk.data.network.GithubRawServices
 import com.topjohnwu.magisk.extensions.DynamicClassLoader
-import com.topjohnwu.magisk.extensions.OnErrorListener
-import com.topjohnwu.magisk.extensions.subscribeK
 import com.topjohnwu.magisk.extensions.writeTo
 import com.topjohnwu.magisk.ui.safetynet.SafetyNetResult
 import com.topjohnwu.magisk.view.MagiskDialog
 import com.topjohnwu.magisk.view.MarkDownWindow
 import com.topjohnwu.superuser.Shell
 import dalvik.system.DexFile
-import io.reactivex.Completable
 import io.reactivex.subjects.PublishSubject
+import kotlinx.coroutines.*
 import org.json.JSONObject
 import org.koin.core.KoinComponent
 import org.koin.core.inject
 import timber.log.Timber
 import java.io.File
+import java.io.IOException
 import java.lang.reflect.InvocationHandler
 
 /**
@@ -38,11 +37,15 @@ abstract class ViewEvent {
     var handled = false
 }
 
+abstract class ViewEventsWithScope: ViewEvent() {
+    lateinit var scope: CoroutineScope
+}
+
 class CheckSafetyNetEvent(
     private val callback: (SafetyNetResult) -> Unit = {}
-) : ViewEvent(), ContextExecutor, KoinComponent, SafetyNetHelper.Callback {
+) : ViewEventsWithScope(), ContextExecutor, KoinComponent, SafetyNetHelper.Callback {
 
-    private val magiskRepo by inject<MagiskRepository>()
+    private val svc by inject<GithubRawServices>()
 
     private lateinit var apk: File
     private lateinit var dex: File
@@ -51,51 +54,72 @@ class CheckSafetyNetEvent(
         apk = File("${context.filesDir.parent}/snet", "snet.jar")
         dex = File(apk.parent, "snet.dex")
 
-        attest(context) {
-            // Download and retry
-            Shell.sh("rm -rf " + apk.parent).exec()
-            apk.parentFile?.mkdir()
-            download(context, true)
+        scope.launch {
+            attest(context) {
+                // Download and retry
+                withContext(Dispatchers.IO) {
+                    Shell.sh("rm -rf " + apk.parent).exec()
+                    apk.parentFile?.mkdir()
+                }
+                download(context, true)
+            }
         }
     }
 
-    private fun attest(context: Context, onError: OnErrorListener) {
-        Completable.fromAction {
-            val loader = DynamicClassLoader(apk)
-            val dex = DexFile.loadDex(apk.path, dex.path, 0)
+    private suspend fun attest(context: Context, onError: suspend (Exception) -> Unit) {
+        try {
+            val helper = withContext(Dispatchers.IO) {
+                val loader = DynamicClassLoader(apk)
+                val dex = DexFile.loadDex(apk.path, dex.path, 0)
 
-            // Scan through the dex and find our helper class
-            var helperClass: Class<*>? = null
-            for (className in dex.entries()) {
-                if (className.startsWith("x.")) {
-                    val cls = loader.loadClass(className)
-                    if (InvocationHandler::class.java.isAssignableFrom(cls)) {
-                        helperClass = cls
-                        break
+                // Scan through the dex and find our helper class
+                var helperClass: Class<*>? = null
+                for (className in dex.entries()) {
+                    if (className.startsWith("x.")) {
+                        val cls = loader.loadClass(className)
+                        if (InvocationHandler::class.java.isAssignableFrom(cls)) {
+                            helperClass = cls
+                            break
+                        }
                     }
                 }
+                helperClass ?: throw Exception()
+
+                val helper = helperClass
+                    .getMethod("get", Class::class.java, Context::class.java, Any::class.java)
+                    .invoke(null, SafetyNetHelper::class.java,
+                        context, this@CheckSafetyNetEvent) as SafetyNetHelper
+
+                if (helper.version < Const.SNET_EXT_VER)
+                    throw Exception()
+                helper
             }
-            helperClass ?: throw Exception()
-
-            val helper = helperClass
-                .getMethod("get", Class::class.java, Context::class.java, Any::class.java)
-                .invoke(null, SafetyNetHelper::class.java, context, this) as SafetyNetHelper
-
-            if (helper.version < Const.SNET_EXT_VER)
-                throw Exception()
-
             helper.attest()
-        }.subscribeK(onError = onError)
+        } catch (e: Exception) {
+            if (e is CancellationException)
+                throw e
+            onError(e)
+        }
     }
 
     @Suppress("SameParameterValue")
     private fun download(context: Context, askUser: Boolean) {
-        fun downloadInternal() = magiskRepo.fetchSafetynet()
-            .map { it.byteStream().writeTo(apk) }
-            .subscribeK { attest(context) {
+        fun downloadInternal() = scope.launch {
+            val abort: suspend (Exception) -> Unit = {
                 Timber.e(it)
                 callback(SafetyNetResult())
-            } }
+            }
+            try {
+                withContext(Dispatchers.IO) {
+                    svc.fetchSafetynet().byteStream().writeTo(apk)
+                }
+                attest(context, abort)
+            } catch (e: IOException) {
+                if (e is CancellationException)
+                    throw e
+                abort(e)
+            }
+        }
 
         if (!askUser) {
             downloadInternal()
@@ -126,27 +150,12 @@ class ViewActionEvent(val action: BaseActivity.() -> Unit) : ViewEvent(), Activi
     override fun invoke(activity: BaseActivity) = activity.run(action)
 }
 
-class OpenChangelogEvent(val item: Repo) : ViewEvent(), ContextExecutor {
+class OpenChangelogEvent(val item: Repo) : ViewEventsWithScope(), ContextExecutor {
     override fun invoke(context: Context) {
-        MarkDownWindow.show(context, null, item.readme)
-    }
-}
-
-class RxPermissionEvent(
-    val permissions: List<String>,
-    val callback: PublishSubject<Boolean>
-) : ViewEvent(), ActivityExecutor {
-
-    override fun invoke(activity: BaseActivity) =
-        activity.withPermissions(*permissions.toTypedArray()) {
-            onSuccess {
-                callback.onNext(true)
-            }
-            onFailure {
-                callback.onNext(false)
-                callback.onError(SecurityException("User refused permissions"))
-            }
+        scope.launch {
+            MarkDownWindow.show(context, null, item::readme)
         }
+    }
 }
 
 class PermissionEvent(
diff --git a/app/src/main/java/com/topjohnwu/magisk/model/events/dialog/ManagerInstallDialog.kt b/app/src/main/java/com/topjohnwu/magisk/model/events/dialog/ManagerInstallDialog.kt
index 507bb243b..c10d572b1 100644
--- a/app/src/main/java/com/topjohnwu/magisk/model/events/dialog/ManagerInstallDialog.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/model/events/dialog/ManagerInstallDialog.kt
@@ -8,6 +8,9 @@ import com.topjohnwu.magisk.model.entity.internal.Configuration
 import com.topjohnwu.magisk.model.entity.internal.DownloadSubject
 import com.topjohnwu.magisk.view.MagiskDialog
 import com.topjohnwu.magisk.view.MarkDownWindow
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.launch
 
 class ManagerInstallDialog : DialogEvent() {
 
@@ -28,7 +31,11 @@ class ManagerInstallDialog : DialogEvent() {
             if (Info.remote.app.note.isEmpty()) return
             applyButton(MagiskDialog.ButtonType.NEGATIVE) {
                 titleRes = R.string.app_changelog
-                onClick { MarkDownWindow.show(context, null, Info.remote.app.note) }
+                onClick {
+                    GlobalScope.launch(Dispatchers.Main.immediate) {
+                        MarkDownWindow.show(context, null, Info.remote.app.note)
+                    }
+                }
             }
         }
     }
diff --git a/app/src/main/java/com/topjohnwu/magisk/ui/base/BaseViewModel.kt b/app/src/main/java/com/topjohnwu/magisk/ui/base/BaseViewModel.kt
index 39545dbcb..f82629d74 100644
--- a/app/src/main/java/com/topjohnwu/magisk/ui/base/BaseViewModel.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/ui/base/BaseViewModel.kt
@@ -10,6 +10,7 @@ import androidx.databinding.PropertyChangeRegistry
 import androidx.lifecycle.LiveData
 import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
 import androidx.navigation.NavDirections
 import com.topjohnwu.magisk.BR
 import com.topjohnwu.magisk.core.Info
@@ -96,6 +97,11 @@ abstract class BaseViewModel(
         _viewEvents.postValue(this)
     }
 
+    fun <Event : ViewEventsWithScope> Event.publish() {
+        scope = viewModelScope
+        _viewEvents.postValue(this)
+    }
+
     fun Int.publish() {
         _viewEvents.postValue(SimpleViewEvent(this))
     }
diff --git a/app/src/main/java/com/topjohnwu/magisk/ui/flash/FlashViewModel.kt b/app/src/main/java/com/topjohnwu/magisk/ui/flash/FlashViewModel.kt
index 69a9e8c38..36f9e1c87 100644
--- a/app/src/main/java/com/topjohnwu/magisk/ui/flash/FlashViewModel.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/ui/flash/FlashViewModel.kt
@@ -42,7 +42,7 @@ class FlashViewModel(
     private val logItems = Collections.synchronizedList(mutableListOf<String>())
 
     init {
-        outItems.sendUpdatesTo(items) { it.map { ConsoleItem(it) } }
+        outItems.sendUpdatesTo(items, viewModelScope) { it.map { ConsoleItem(it) } }
         outItems.copyNewInputInto(logItems)
 
         args.dismissId.takeIf { it != -1 }?.also {
diff --git a/app/src/main/java/com/topjohnwu/magisk/ui/install/InstallFragment.kt b/app/src/main/java/com/topjohnwu/magisk/ui/install/InstallFragment.kt
index 105f44d41..cf26b4886 100644
--- a/app/src/main/java/com/topjohnwu/magisk/ui/install/InstallFragment.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/ui/install/InstallFragment.kt
@@ -1,6 +1,7 @@
 package com.topjohnwu.magisk.ui.install
 
 import android.content.Intent
+import androidx.lifecycle.viewModelScope
 import com.topjohnwu.magisk.R
 import com.topjohnwu.magisk.databinding.FragmentInstallMd2Binding
 import com.topjohnwu.magisk.extensions.value
@@ -21,6 +22,9 @@ class InstallFragment : BaseUIFragment<InstallViewModel, FragmentInstallMd2Bindi
     override fun onStart() {
         super.onStart()
         requireActivity().setTitle(R.string.install)
+
+        // Allow markwon to run in viewmodel scope
+        binding.releaseNotes.tag = viewModel.viewModelScope
     }
 
 }
diff --git a/app/src/main/java/com/topjohnwu/magisk/ui/install/InstallViewModel.kt b/app/src/main/java/com/topjohnwu/magisk/ui/install/InstallViewModel.kt
index 187ecda41..d9a810be1 100644
--- a/app/src/main/java/com/topjohnwu/magisk/ui/install/InstallViewModel.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/ui/install/InstallViewModel.kt
@@ -1,10 +1,9 @@
 package com.topjohnwu.magisk.ui.install
 
 import android.net.Uri
-import android.text.SpannableString
-import android.text.Spanned
 import android.widget.Toast
 import androidx.databinding.ObservableField
+import androidx.lifecycle.viewModelScope
 import com.topjohnwu.magisk.R
 import com.topjohnwu.magisk.core.Info
 import com.topjohnwu.magisk.core.download.DownloadService
@@ -12,7 +11,6 @@ import com.topjohnwu.magisk.core.download.RemoteFileService
 import com.topjohnwu.magisk.core.utils.Utils
 import com.topjohnwu.magisk.data.repository.StringRepository
 import com.topjohnwu.magisk.extensions.addOnPropertyChangedCallback
-import com.topjohnwu.magisk.extensions.subscribeK
 import com.topjohnwu.magisk.extensions.value
 import com.topjohnwu.magisk.model.entity.internal.Configuration
 import com.topjohnwu.magisk.model.entity.internal.DownloadSubject
@@ -20,13 +18,12 @@ import com.topjohnwu.magisk.model.events.RequestFileEvent
 import com.topjohnwu.magisk.model.events.dialog.SecondSlotWarningDialog
 import com.topjohnwu.magisk.ui.base.BaseViewModel
 import com.topjohnwu.superuser.Shell
-import io.noties.markwon.Markwon
+import kotlinx.coroutines.launch
 import org.koin.core.get
 import kotlin.math.roundToInt
 
 class InstallViewModel(
-    stringRepo: StringRepository,
-    markwon: Markwon
+    stringRepo: StringRepository
 ) : BaseViewModel(State.LOADED) {
 
     val isRooted get() = Shell.rootAccess()
@@ -35,8 +32,8 @@ class InstallViewModel(
     val step = ObservableField(0)
     val method = ObservableField(-1)
     val progress = ObservableField(0)
-    val data = ObservableField<Uri?>(null)
-    val notes = ObservableField<Spanned>(SpannableString(""))
+    val data = ObservableField(null as Uri?)
+    val notes = ObservableField("")
 
     init {
         RemoteFileService.reset()
@@ -50,10 +47,8 @@ class InstallViewModel(
                 state = State.LOADED
             }
         }
-        stringRepo.getString(Info.remote.magisk.note).map {
-            markwon.toMarkdown(it)
-        }.subscribeK {
-            notes.value = it
+        viewModelScope.launch {
+            notes.value = stringRepo.getString(Info.remote.magisk.note)
         }
         method.addOnPropertyChangedCallback {
             when (it!!) {
diff --git a/app/src/main/java/com/topjohnwu/magisk/ui/safetynet/SafetynetViewModel.kt b/app/src/main/java/com/topjohnwu/magisk/ui/safetynet/SafetynetViewModel.kt
index 2ba78357e..4756ca186 100644
--- a/app/src/main/java/com/topjohnwu/magisk/ui/safetynet/SafetynetViewModel.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/ui/safetynet/SafetynetViewModel.kt
@@ -50,7 +50,7 @@ class SafetynetViewModel : BaseViewModel() {
 
     private fun attest() {
         currentState = LOADING
-        CheckSafetyNetEvent {
+        CheckSafetyNetEvent() {
             resolveResponse(it)
         }.publish()
     }
diff --git a/app/src/main/java/com/topjohnwu/magisk/ui/settings/SettingsItems.kt b/app/src/main/java/com/topjohnwu/magisk/ui/settings/SettingsItems.kt
index 2c17172b4..f6816a7b4 100644
--- a/app/src/main/java/com/topjohnwu/magisk/ui/settings/SettingsItems.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/ui/settings/SettingsItems.kt
@@ -16,10 +16,11 @@ import com.topjohnwu.magisk.databinding.DialogSettingsAppNameBinding
 import com.topjohnwu.magisk.databinding.DialogSettingsDownloadPathBinding
 import com.topjohnwu.magisk.databinding.DialogSettingsUpdateChannelBinding
 import com.topjohnwu.magisk.extensions.get
-import com.topjohnwu.magisk.extensions.subscribeK
 import com.topjohnwu.magisk.model.entity.recycler.SettingsItem
 import com.topjohnwu.magisk.utils.asTransitive
 import com.topjohnwu.superuser.Shell
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.launch
 import java.io.File
 
 // --- Customization
@@ -38,13 +39,15 @@ object Language : SettingsItem.Selector() {
     override var entries = emptyArray<String>()
     override var entryValues = emptyArray<String>()
 
-    init {
-        availableLocales.subscribeK { (names, values) ->
-            entries = names
-            entryValues = values
-            val selectedLocale = currentLocale.getDisplayName(currentLocale)
-            value = names.indexOfFirst { it == selectedLocale }.let { if (it == -1) 0 else it }
-            notifyChange(BR.selectedEntry)
+    suspend fun loadLanguages(scope: CoroutineScope) {
+        scope.launch {
+            availableLocales().let { (names, values) ->
+                entries = names
+                entryValues = values
+                val selectedLocale = currentLocale.getDisplayName(currentLocale)
+                value = names.indexOfFirst { it == selectedLocale }.let { if (it == -1) 0 else it }
+                notifyChange(BR.selectedEntry)
+            }
         }
     }
 }
diff --git a/app/src/main/java/com/topjohnwu/magisk/ui/settings/SettingsViewModel.kt b/app/src/main/java/com/topjohnwu/magisk/ui/settings/SettingsViewModel.kt
index f5fb47c51..81c09109a 100644
--- a/app/src/main/java/com/topjohnwu/magisk/ui/settings/SettingsViewModel.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/ui/settings/SettingsViewModel.kt
@@ -1,9 +1,9 @@
 package com.topjohnwu.magisk.ui.settings
 
-import android.Manifest
 import android.os.Build
 import android.view.View
 import android.widget.Toast
+import androidx.lifecycle.viewModelScope
 import com.topjohnwu.magisk.BR
 import com.topjohnwu.magisk.R
 import com.topjohnwu.magisk.core.Const
@@ -12,21 +12,18 @@ import com.topjohnwu.magisk.core.download.DownloadService
 import com.topjohnwu.magisk.core.utils.PatchAPK
 import com.topjohnwu.magisk.core.utils.Utils
 import com.topjohnwu.magisk.data.database.RepoDao
-import com.topjohnwu.magisk.extensions.subscribeK
 import com.topjohnwu.magisk.extensions.value
 import com.topjohnwu.magisk.model.entity.internal.Configuration
 import com.topjohnwu.magisk.model.entity.internal.DownloadSubject
 import com.topjohnwu.magisk.model.entity.recycler.SettingsItem
 import com.topjohnwu.magisk.model.events.RecreateEvent
-import com.topjohnwu.magisk.model.events.RxPermissionEvent
 import com.topjohnwu.magisk.model.events.dialog.BiometricDialog
 import com.topjohnwu.magisk.ui.base.BaseViewModel
 import com.topjohnwu.magisk.ui.base.adapterOf
 import com.topjohnwu.magisk.ui.base.diffListOf
 import com.topjohnwu.magisk.ui.base.itemBindingOf
 import com.topjohnwu.superuser.Shell
-import io.reactivex.Completable
-import io.reactivex.subjects.PublishSubject
+import kotlinx.coroutines.launch
 import org.koin.core.get
 
 class SettingsViewModel(
@@ -48,6 +45,9 @@ class SettingsViewModel(
             // making theming a pain in the ass. Just forget about it
             list.remove(Theme)
         }
+        viewModelScope.launch {
+            Language.loadLanguages(this)
+        }
 
         // Manager
         list.addAll(listOf(
@@ -125,8 +125,10 @@ class SettingsViewModel(
     }
 
     private fun clearRepoCache() {
-        Completable.fromAction { repositoryDao.clear() }
-            .subscribeK { Utils.toast(R.string.repo_cache_cleared, Toast.LENGTH_SHORT) }
+        viewModelScope.launch {
+            repositoryDao.clear()
+            Utils.toast(R.string.repo_cache_cleared, Toast.LENGTH_SHORT)
+        }
     }
 
     private fun createHosts() {
@@ -136,14 +138,7 @@ class SettingsViewModel(
     }
 
     private fun requireRWPermission() {
-        val callback = PublishSubject.create<Boolean>()
-        callback.subscribeK { if (!it) requireRWPermission() }
-        RxPermissionEvent(
-            listOf(
-                Manifest.permission.READ_EXTERNAL_STORAGE,
-                Manifest.permission.WRITE_EXTERNAL_STORAGE
-            ), callback
-        ).publish()
+        withExternalRW { if (!it) requireRWPermission() }
     }
 
     private fun updateManager(hide: Boolean) {
diff --git a/app/src/main/java/com/topjohnwu/magisk/utils/DataBindingAdapters.kt b/app/src/main/java/com/topjohnwu/magisk/utils/DataBindingAdapters.kt
index 83ce0e6bb..bbad3a7a0 100644
--- a/app/src/main/java/com/topjohnwu/magisk/utils/DataBindingAdapters.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/utils/DataBindingAdapters.kt
@@ -22,11 +22,8 @@ import com.google.android.material.chip.Chip
 import com.google.android.material.textfield.TextInputLayout
 import com.topjohnwu.magisk.R
 import com.topjohnwu.magisk.extensions.replaceRandomWithSpecial
-import com.topjohnwu.magisk.extensions.subscribeK
 import com.topjohnwu.superuser.internal.UiThreadHandler
-import io.reactivex.Observable
-import io.reactivex.disposables.Disposable
-import java.util.concurrent.TimeUnit
+import kotlinx.coroutines.*
 import kotlin.math.roundToInt
 
 
@@ -42,14 +39,15 @@ fun setImageResource(view: AppCompatImageView, @DrawableRes resId: Int) {
 
 @BindingAdapter("movieBehavior", "movieBehaviorText")
 fun setMovieBehavior(view: TextView, isMovieBehavior: Boolean, text: String) {
-    (view.tag as? Disposable)?.dispose()
+    (view.tag as? Job)?.cancel()
+    view.tag = null
     if (isMovieBehavior) {
-        val observer = Observable
-            .interval(150, TimeUnit.MILLISECONDS)
-            .subscribeK {
+        view.tag = GlobalScope.launch(Dispatchers.Main.immediate) {
+            while (true) {
+                delay(150)
                 view.text = text.replaceRandomWithSpecial()
             }
-        view.tag = observer
+        }
     } else {
         view.text = text
     }
diff --git a/app/src/main/java/com/topjohnwu/magisk/view/MagiskDialog.kt b/app/src/main/java/com/topjohnwu/magisk/view/MagiskDialog.kt
index 49ed8a911..b0eff1453 100644
--- a/app/src/main/java/com/topjohnwu/magisk/view/MagiskDialog.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/view/MagiskDialog.kt
@@ -28,7 +28,7 @@ import com.topjohnwu.magisk.ui.base.itemBindingOf
 import me.tatarka.bindingcollectionadapter2.BindingRecyclerViewAdapters
 import me.tatarka.bindingcollectionadapter2.ItemBinding
 
-class MagiskDialog @JvmOverloads constructor(
+class MagiskDialog(
     context: Context, theme: Int = 0
 ) : AppCompatDialog(context, theme) {
 
diff --git a/app/src/main/java/com/topjohnwu/magisk/view/MarkDownWindow.kt b/app/src/main/java/com/topjohnwu/magisk/view/MarkDownWindow.kt
index c2304f863..9da1056a7 100644
--- a/app/src/main/java/com/topjohnwu/magisk/view/MarkDownWindow.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/view/MarkDownWindow.kt
@@ -1,58 +1,66 @@
 package com.topjohnwu.magisk.view
 
 import android.content.Context
+import android.text.Spanned
 import android.view.LayoutInflater
 import android.widget.TextView
+import androidx.core.text.PrecomputedTextCompat
+import androidx.core.widget.TextViewCompat
 import com.topjohnwu.magisk.R
 import com.topjohnwu.magisk.data.repository.StringRepository
-import com.topjohnwu.magisk.extensions.subscribeK
 import io.noties.markwon.Markwon
-import io.reactivex.Completable
-import io.reactivex.Single
+import kotlinx.coroutines.*
 import org.koin.core.KoinComponent
 import org.koin.core.inject
 import timber.log.Timber
-import java.io.InputStream
-import java.util.*
+import kotlin.coroutines.coroutineContext
 
-object MarkDownWindow : KoinComponent {
+class PrecomputedTextSetter : Markwon.TextSetter {
 
-    private val stringRepo: StringRepository by inject()
-    private val markwon: Markwon by inject()
-
-    fun show(activity: Context, title: String?, url: String) {
-        show(activity, title, stringRepo.getString(url))
-    }
-
-    fun show(activity: Context, title: String?, input: InputStream) {
-        Single.just(Scanner(input, "UTF-8").apply { useDelimiter("\\A") })
-            .map { it.next() }
-            .also {
-                show(activity, title, it)
+    override fun setText(tv: TextView, text: Spanned, bufferType: TextView.BufferType, onComplete: Runnable) {
+        val scope = tv.tag as? CoroutineScope ?: GlobalScope
+        scope.launch(Dispatchers.Default) {
+            val pre = PrecomputedTextCompat.create(text, TextViewCompat.getTextMetricsParams(tv))
+            tv.post {
+                TextViewCompat.setPrecomputedText(tv, pre)
+                onComplete.run()
             }
-    }
-
-    fun show(activity: Context, title: String?, content: Single<String>) {
-        val mdRes = R.layout.markdown_window_md2
-        val mv = LayoutInflater.from(activity).inflate(mdRes, null)
-        val tv = mv.findViewById<TextView>(R.id.md_txt)
-
-        content.map {
-            markwon.setMarkdown(tv, it)
-        }.ignoreElement().onErrorResumeNext {
-            // Nothing we can actually do other than show error message
-            Timber.e(it)
-            tv.setText(R.string.download_file_error)
-            Completable.complete()
-        }.subscribeK {
-            MagiskDialog(activity)
-                .applyTitle(title ?: "")
-                .applyView(mv)
-                .applyButton(MagiskDialog.ButtonType.NEGATIVE) {
-                    titleRes = android.R.string.cancel
-                }
-                .reveal()
-            return@subscribeK
         }
     }
 }
+
+object MarkDownWindow : KoinComponent {
+
+    private val repo: StringRepository by inject()
+    private val markwon: Markwon by inject()
+
+    suspend fun show(activity: Context, title: String?, url: String) {
+        show(activity, title) {
+            repo.getString(url)
+        }
+    }
+
+    suspend fun show(activity: Context, title: String?, input: suspend () -> String) {
+        val mdRes = R.layout.markdown_window_md2
+        val mv = LayoutInflater.from(activity).inflate(mdRes, null)
+        val tv = mv.findViewById<TextView>(R.id.md_txt)
+        tv.tag = CoroutineScope(coroutineContext)
+
+        try {
+            markwon.setMarkdown(tv, input())
+        } catch (e: Exception) {
+            if (e is CancellationException)
+                throw e
+            Timber.e(e)
+            tv.setText(R.string.download_file_error)
+        }
+
+        MagiskDialog(activity)
+            .applyTitle(title ?: "")
+            .applyView(mv)
+            .applyButton(MagiskDialog.ButtonType.NEGATIVE) {
+                titleRes = android.R.string.cancel
+            }
+            .reveal()
+    }
+}
diff --git a/app/src/main/res/layout/fragment_install_md2.xml b/app/src/main/res/layout/fragment_install_md2.xml
index 01bf98bb1..066ae40a6 100644
--- a/app/src/main/res/layout/fragment_install_md2.xml
+++ b/app/src/main/res/layout/fragment_install_md2.xml
@@ -228,11 +228,12 @@
                     app:strokeWidth="@{viewModel.step != 0 ? 0f : @dimen/l_125}">
 
                     <TextView
+                        android:id="@+id/release_notes"
                         android:layout_width="match_parent"
                         android:layout_height="wrap_content"
                         android:layout_margin="15dp"
                         android:textAppearance="@style/AppearanceFoundation.Caption"
-                        android:text="@{viewModel.notes}"/>
+                        markdownText="@{viewModel.notes}"/>
 
                 </com.google.android.material.card.MaterialCardView>