diff --git a/app/build.gradle b/app/build.gradle
index c092650bc..fff945444 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -81,6 +81,7 @@ dependencies {
     def vRetrofit = "2.6.0"
     implementation "com.squareup.retrofit2:retrofit:${vRetrofit}"
     implementation "com.squareup.retrofit2:converter-moshi:${vRetrofit}"
+    implementation "com.squareup.retrofit2:converter-scalars:${vRetrofit}"
     implementation "com.squareup.retrofit2:adapter-rxjava2:${vRetrofit}"
 
     def vOkHttp = '4.0.1'
@@ -101,6 +102,7 @@ dependencies {
     }
     def vRoom = "2.1.0"
     implementation "com.github.topjohnwu:room-runtime:${vRoom}"
+    kapt "androidx.room:room-compiler:${vRoom}"
 
     implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
     implementation 'androidx.browser:browser:1.0.0'
diff --git a/app/src/main/java/com/topjohnwu/magisk/App.kt b/app/src/main/java/com/topjohnwu/magisk/App.kt
index 1feb6d8a1..863d0a8b3 100644
--- a/app/src/main/java/com/topjohnwu/magisk/App.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/App.kt
@@ -13,6 +13,8 @@ import androidx.multidex.MultiDex
 import androidx.room.Room
 import androidx.work.impl.WorkDatabase
 import androidx.work.impl.WorkDatabase_Impl
+import com.topjohnwu.magisk.data.database.RepoDatabase
+import com.topjohnwu.magisk.data.database.RepoDatabase_Impl
 import com.topjohnwu.magisk.di.koinModules
 import com.topjohnwu.magisk.utils.LocaleManager
 import com.topjohnwu.magisk.utils.RootUtils
@@ -113,6 +115,7 @@ open class App : Application(), Application.ActivityLifecycleCallbacks {
             Room.setFactory {
                 when (it) {
                     WorkDatabase::class.java -> WorkDatabase_Impl()
+                    RepoDatabase::class.java -> RepoDatabase_Impl()
                     else -> null
                 }
             }
diff --git a/app/src/main/java/com/topjohnwu/magisk/Config.kt b/app/src/main/java/com/topjohnwu/magisk/Config.kt
index 6f08cbb52..72b7c0eec 100644
--- a/app/src/main/java/com/topjohnwu/magisk/Config.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/Config.kt
@@ -41,7 +41,6 @@ object Config : PreferenceModel, DBConfig {
         const val CUSTOM_CHANNEL = "custom_channel"
         const val LOCALE = "locale"
         const val DARK_THEME = "dark_theme"
-        const val ETAG_KEY = "ETag"
         const val REPO_ORDER = "repo_order"
         const val SHOW_SYSTEM_APP = "show_system"
         const val DOWNLOAD_CACHE = "download_cache"
@@ -117,8 +116,6 @@ object Config : PreferenceModel, DBConfig {
 
     var customChannelUrl by preference(Key.CUSTOM_CHANNEL, "")
     var locale by preference(Key.LOCALE, "")
-    @JvmStatic
-    var etagKey by preference(Key.ETAG_KEY, "")
 
     var rootMode by dbSettings(Key.ROOT_ACCESS, Value.ROOT_ACCESS_APPS_AND_ADB)
     var suMntNamespaceMode by dbSettings(Key.SU_MNT_NS, Value.NAMESPACE_MODE_REQUESTER)
@@ -195,7 +192,6 @@ object Config : PreferenceModel, DBConfig {
                 }
             }
             config.delete()
-            remove(Key.ETAG_KEY)
         }
     }
 
diff --git a/app/src/main/java/com/topjohnwu/magisk/Const.kt b/app/src/main/java/com/topjohnwu/magisk/Const.kt
index 694ca87c2..27657780a 100644
--- a/app/src/main/java/com/topjohnwu/magisk/Const.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/Const.kt
@@ -53,13 +53,7 @@ object Const {
     }
 
     object Url {
-        @Deprecated("This shouldn't be used. There's literally no need for it")
-        const val REPO_URL =
-            "https://api.github.com/users/Magisk-Modules-Repo/repos?per_page=100&sort=pushed&page=%d"
-        const val FILE_URL = "https://raw.githubusercontent.com/Magisk-Modules-Repo/%s/master/%s"
         const val ZIP_URL = "https://github.com/Magisk-Modules-Repo/%s/archive/master.zip"
-        const val MODULE_INSTALLER =
-            "https://raw.githubusercontent.com/topjohnwu/Magisk/master/scripts/module_installer.sh"
         const val PAYPAL_URL = "https://www.paypal.me/topjohnwu"
         const val PATREON_URL = "https://www.patreon.com/topjohnwu"
         const val TWITTER_URL = "https://twitter.com/topjohnwu"
@@ -67,16 +61,19 @@ object Const {
         const val SOURCE_CODE_URL = "https://github.com/topjohnwu/Magisk"
         @JvmField
         val BOOTCTL_URL = getRaw("9c5dfc1b8245c0b5b524901ef0ff0f8335757b77", "bootctl")
-        const val GITHUB_RAW_API_URL = "https://raw.githubusercontent.com/"
+
+        const val GITHUB_RAW_URL = "https://raw.githubusercontent.com/"
+        const val GITHUB_API_URL = "https://api.github.com/users/Magisk-Modules-Repo/"
 
         private fun getRaw(where: String, name: String) =
-            "${GITHUB_RAW_API_URL}topjohnwu/magisk_files/$where/$name"
+            "${GITHUB_RAW_URL}topjohnwu/magisk_files/$where/$name"
     }
 
     object Key {
         // others
         const val LINK_KEY = "Link"
         const val IF_NONE_MATCH = "If-None-Match"
+        const val ETAG_KEY = "ETag"
         // intents
         const val OPEN_SECTION = "section"
         const val INTENT_SET_NAME = "filename"
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
new file mode 100644
index 000000000..b667a0734
--- /dev/null
+++ b/app/src/main/java/com/topjohnwu/magisk/data/database/RepoDao.kt
@@ -0,0 +1,70 @@
+package com.topjohnwu.magisk.data.database
+
+import androidx.room.*
+import com.topjohnwu.magisk.Config
+import com.topjohnwu.magisk.model.entity.module.Repo
+
+@Dao
+abstract class RepoDao {
+
+    val repoIDSet: Set<String> get() = getRepoID().map { it.id }.toSet()
+
+    val repos: List<Repo> get() = getReposWithOrder(when (Config.repoOrder) {
+            Config.Value.ORDER_NAME -> "name COLLATE NOCASE"
+            Config.Value.ORDER_DATE -> "last_update DESC"
+            else -> ""
+        })
+
+    var etagKey: String
+        set(etag) = addEtagRaw(RepoEtag(0, etag))
+        get() = etagRaw()?.key.orEmpty()
+
+    fun clear() {
+        clearRepos()
+        clearEtag()
+    }
+
+    @Query("SELECT * FROM repos ORDER BY :order")
+    protected abstract fun getReposWithOrder(order: String): List<Repo>
+
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    abstract fun addRepo(repo: Repo)
+
+    @Query("SELECT * FROM repos WHERE id = :id")
+    abstract fun getRepo(id: String): Repo?
+
+    @Query("SELECT id FROM repos")
+    protected abstract fun getRepoID(): List<RepoID>
+
+    @Delete
+    abstract fun removeRepo(repo: Repo)
+
+    @Query("DELETE FROM repos WHERE id = :id")
+    abstract fun removeRepo(id: String)
+
+    @Query("DELETE FROM repos WHERE id IN (:idList)")
+    abstract fun removeRepos(idList: List<String>)
+
+    @Query("SELECT * FROM etag")
+    protected abstract fun etagRaw(): RepoEtag?
+
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    protected abstract fun addEtagRaw(etag: RepoEtag)
+
+    @Query("DELETE FROM repos")
+    protected abstract fun clearRepos()
+
+    @Query("DELETE FROM etag")
+    protected abstract fun clearEtag()
+}
+
+data class RepoID(
+    @PrimaryKey val id: String
+)
+
+@Entity(tableName = "etag")
+data class RepoEtag(
+    @PrimaryKey val id: Int,
+    val key: String
+)
+
diff --git a/app/src/main/java/com/topjohnwu/magisk/data/database/RepoDatabase.kt b/app/src/main/java/com/topjohnwu/magisk/data/database/RepoDatabase.kt
new file mode 100644
index 000000000..c7ad3a00e
--- /dev/null
+++ b/app/src/main/java/com/topjohnwu/magisk/data/database/RepoDatabase.kt
@@ -0,0 +1,11 @@
+package com.topjohnwu.magisk.data.database
+
+import androidx.room.Database
+import androidx.room.RoomDatabase
+import com.topjohnwu.magisk.model.entity.module.Repo
+
+@Database(version = 6, entities = [Repo::class, RepoEtag::class])
+abstract class RepoDatabase : RoomDatabase() {
+
+    abstract fun repoDao() : RepoDao
+}
diff --git a/app/src/main/java/com/topjohnwu/magisk/data/database/RepoDatabaseHelper.kt b/app/src/main/java/com/topjohnwu/magisk/data/database/RepoDatabaseHelper.kt
deleted file mode 100644
index 84fc236ad..000000000
--- a/app/src/main/java/com/topjohnwu/magisk/data/database/RepoDatabaseHelper.kt
+++ /dev/null
@@ -1,109 +0,0 @@
-package com.topjohnwu.magisk.data.database
-
-import android.content.Context
-import android.database.Cursor
-import android.database.sqlite.SQLiteDatabase
-import android.database.sqlite.SQLiteOpenHelper
-import androidx.core.content.edit
-import com.topjohnwu.magisk.Config
-import com.topjohnwu.magisk.model.entity.Repo
-import java.util.*
-
-@Deprecated("")
-class RepoDatabaseHelper
-constructor(context: Context) : SQLiteOpenHelper(context, "repo.db", null, DATABASE_VER) {
-
-    private val mDb: SQLiteDatabase = writableDatabase
-
-    val rawCursor: Cursor
-        @Deprecated("")
-        get() = mDb.query(TABLE_NAME, null, null, null, null, null, null)
-
-    val repoCursor: Cursor
-        @Deprecated("")
-        get() {
-            var orderBy: String? = null
-            when (Config.repoOrder) {
-                Config.Value.ORDER_NAME -> orderBy = "name COLLATE NOCASE"
-                Config.Value.ORDER_DATE -> orderBy = "last_update DESC"
-            }
-            return mDb.query(TABLE_NAME, null, null, null, null, null, orderBy)
-        }
-
-    val repoIDSet: Set<String>
-        @Deprecated("")
-        get() {
-            val set = HashSet<String>(300)
-            mDb.query(TABLE_NAME, null, null, null, null, null, null).use { c ->
-                while (c.moveToNext()) {
-                    set.add(c.getString(c.getColumnIndex("id")))
-                }
-            }
-            return set
-        }
-
-    override fun onCreate(db: SQLiteDatabase) {
-        onUpgrade(db, 0, DATABASE_VER)
-    }
-
-    override fun onUpgrade(db: SQLiteDatabase, oldVersion: Int, newVersion: Int) {
-        if (oldVersion != newVersion) {
-            // Nuke old DB and create new table
-            db.execSQL("DROP TABLE IF EXISTS $TABLE_NAME")
-            db.execSQL(
-                    "CREATE TABLE IF NOT EXISTS " + TABLE_NAME + " " +
-                            "(id TEXT, name TEXT, version TEXT, versionCode INT, " +
-                            "author TEXT, description TEXT, last_update INT, PRIMARY KEY(id))")
-            Config.prefs.edit {
-                remove(Config.Key.ETAG_KEY)
-            }
-        }
-    }
-
-    override fun onDowngrade(db: SQLiteDatabase, oldVersion: Int, newVersion: Int) {
-        onUpgrade(db, 0, DATABASE_VER)
-    }
-
-    @Deprecated("")
-    fun clearRepo() {
-        mDb.delete(TABLE_NAME, null, null)
-    }
-
-
-    @Deprecated("")
-    fun removeRepo(id: String) {
-        mDb.delete(TABLE_NAME, "id=?", arrayOf(id))
-    }
-
-    @Deprecated("")
-    fun removeRepo(repo: Repo) {
-        removeRepo(repo.id)
-    }
-
-    @Deprecated("")
-    fun removeRepo(list: Iterable<String>) {
-        list.forEach {
-            mDb.delete(TABLE_NAME, "id=?", arrayOf(it))
-        }
-    }
-
-    @Deprecated("")
-    fun addRepo(repo: Repo) {
-        mDb.replace(TABLE_NAME, null, repo.contentValues)
-    }
-
-    @Deprecated("")
-    fun getRepo(id: String): Repo? {
-        mDb.query(TABLE_NAME, null, "id=?", arrayOf(id), null, null, null).use { c ->
-            if (c.moveToNext()) {
-                return Repo(c)
-            }
-        }
-        return null
-    }
-
-    companion object {
-        private val DATABASE_VER = 5
-        private val TABLE_NAME = "repos"
-    }
-}
diff --git a/app/src/main/java/com/topjohnwu/magisk/data/network/GithubRawApiServices.kt b/app/src/main/java/com/topjohnwu/magisk/data/network/GithubServices.kt
similarity index 72%
rename from app/src/main/java/com/topjohnwu/magisk/data/network/GithubRawApiServices.kt
rename to app/src/main/java/com/topjohnwu/magisk/data/network/GithubServices.kt
index f90468678..8ed29d5ad 100644
--- a/app/src/main/java/com/topjohnwu/magisk/data/network/GithubRawApiServices.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/data/network/GithubServices.kt
@@ -2,15 +2,14 @@ package com.topjohnwu.magisk.data.network
 
 import com.topjohnwu.magisk.Const
 import com.topjohnwu.magisk.model.entity.UpdateInfo
+import com.topjohnwu.magisk.tasks.GithubRepoInfo
+import io.reactivex.Flowable
 import io.reactivex.Single
 import okhttp3.ResponseBody
-import retrofit2.http.GET
-import retrofit2.http.Path
-import retrofit2.http.Streaming
-import retrofit2.http.Url
+import retrofit2.adapter.rxjava2.Result
+import retrofit2.http.*
 
-
-interface GithubRawApiServices {
+interface GithubRawServices {
 
     //region topjohnwu/magisk_files
 
@@ -41,6 +40,9 @@ interface GithubRawApiServices {
     @Streaming
     fun fetchInstaller(): Single<ResponseBody>
 
+    @GET("$MAGISK_MODULES/{$MODULE}/master/{$FILE}")
+    fun fetchModuleInfo(@Path(MODULE) id: String, @Path(FILE) file: String): Single<String>
+
     //endregion
 
     /**
@@ -51,6 +53,9 @@ interface GithubRawApiServices {
     @Streaming
     fun fetchFile(@Url url: String): Single<ResponseBody>
 
+    @GET
+    fun fetchString(@Url url: String): Single<String>
+
 
     companion object {
         private const val REVISION = "revision"
@@ -63,4 +68,14 @@ interface GithubRawApiServices {
         private const val MAGISK_MODULES = "Magisk-Modules-Repo"
     }
 
+}
+
+interface GithubApiServices {
+
+    @GET("repos")
+    fun fetchRepos(@Query("page") page: Int,
+                   @Header(Const.Key.IF_NONE_MATCH) etag: String,
+                   @Query("sort") sort: String = "pushed",
+                   @Query("per_page") count: Int = 100): Flowable<Result<List<GithubRepoInfo>>>
+
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/topjohnwu/magisk/data/repository/FileRepository.kt b/app/src/main/java/com/topjohnwu/magisk/data/repository/FileRepository.kt
deleted file mode 100644
index e1d9c7f1f..000000000
--- a/app/src/main/java/com/topjohnwu/magisk/data/repository/FileRepository.kt
+++ /dev/null
@@ -1,13 +0,0 @@
-package com.topjohnwu.magisk.data.repository
-
-import com.topjohnwu.magisk.data.network.GithubRawApiServices
-
-class FileRepository(
-    private val api: GithubRawApiServices
-) {
-
-    fun downloadFile(url: String) = api.fetchFile(url)
-
-    fun downloadInstaller() = api.fetchInstaller()
-
-}
\ No newline at end of file
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 bfdf9ffe2..f61d83715 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
@@ -1,12 +1,11 @@
 package com.topjohnwu.magisk.data.repository
 
-import android.content.Context
 import android.content.pm.PackageManager
 import com.topjohnwu.magisk.App
 import com.topjohnwu.magisk.Config
 import com.topjohnwu.magisk.Info
 import com.topjohnwu.magisk.data.database.base.su
-import com.topjohnwu.magisk.data.network.GithubRawApiServices
+import com.topjohnwu.magisk.data.network.GithubRawServices
 import com.topjohnwu.magisk.model.entity.HideAppInfo
 import com.topjohnwu.magisk.model.entity.HideTarget
 import com.topjohnwu.magisk.utils.Utils
@@ -16,9 +15,8 @@ import com.topjohnwu.superuser.Shell
 import io.reactivex.Single
 
 class MagiskRepository(
-    private val context: Context,
-    private val apiRaw: GithubRawApiServices,
-    private val packageManager: PackageManager
+        private val apiRaw: GithubRawServices,
+        private val packageManager: PackageManager
 ) {
 
     fun fetchSafetynet() = apiRaw.fetchSafetynet()
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
new file mode 100644
index 000000000..9395a06ea
--- /dev/null
+++ b/app/src/main/java/com/topjohnwu/magisk/data/repository/StringRepository.kt
@@ -0,0 +1,15 @@
+package com.topjohnwu.magisk.data.repository
+
+import com.topjohnwu.magisk.data.network.GithubRawServices
+import com.topjohnwu.magisk.model.entity.module.Repo
+
+class StringRepository(
+    private val api: GithubRawServices
+) {
+
+    fun getString(url: String) = api.fetchString(url)
+
+    fun getMetadata(repo: Repo) = api.fetchModuleInfo(repo.id, "module.prop")
+
+    fun getReadme(repo: Repo) = api.fetchModuleInfo(repo.id, "README.md")
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/topjohnwu/magisk/di/DatabaseModule.kt b/app/src/main/java/com/topjohnwu/magisk/di/DatabaseModule.kt
index f9015063c..0ccaef70b 100644
--- a/app/src/main/java/com/topjohnwu/magisk/di/DatabaseModule.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/di/DatabaseModule.kt
@@ -1,7 +1,9 @@
 package com.topjohnwu.magisk.di
 
+import android.content.Context
+import androidx.room.Room
 import com.topjohnwu.magisk.data.database.*
-import com.topjohnwu.magisk.tasks.UpdateRepos
+import com.topjohnwu.magisk.tasks.RepoUpdater
 import org.koin.dsl.module
 
 
@@ -10,6 +12,13 @@ val databaseModule = module {
     single { PolicyDao(get()) }
     single { SettingsDao() }
     single { StringDao() }
-    single { RepoDatabaseHelper(get()) }
-    single { UpdateRepos(get()) }
+    single { createRepoDatabase(get()) }
+    single { get<RepoDatabase>().repoDao() }
+    single { RepoUpdater(get(), get()) }
 }
+
+fun createRepoDatabase(context: Context) =
+        Room.databaseBuilder(context, RepoDatabase::class.java, "repo.db")
+            .fallbackToDestructiveMigration()
+            .allowMainThreadQueries()
+            .build()
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 9601778a1..f47f0aaca 100644
--- a/app/src/main/java/com/topjohnwu/magisk/di/NetworkingModule.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/di/NetworkingModule.kt
@@ -4,20 +4,23 @@ import com.squareup.moshi.JsonAdapter
 import com.squareup.moshi.Moshi
 import com.topjohnwu.magisk.BuildConfig
 import com.topjohnwu.magisk.Const
-import com.topjohnwu.magisk.data.network.GithubRawApiServices
+import com.topjohnwu.magisk.data.network.GithubApiServices
+import com.topjohnwu.magisk.data.network.GithubRawServices
 import okhttp3.OkHttpClient
 import okhttp3.logging.HttpLoggingInterceptor
 import org.koin.dsl.module
 import retrofit2.Retrofit
 import retrofit2.adapter.rxjava2.RxJava2CallAdapterFactory
 import retrofit2.converter.moshi.MoshiConverterFactory
+import retrofit2.converter.scalars.ScalarsConverterFactory
 import se.ansman.kotshi.KotshiJsonAdapterFactory
 
 val networkingModule = module {
     single { createOkHttpClient() }
     single { createMoshiConverterFactory() }
     single { createRetrofit(get(), get()) }
-    single { createApiService<GithubRawApiServices>(get(), Const.Url.GITHUB_RAW_API_URL) }
+    single { createApiService<GithubRawServices>(get(), Const.Url.GITHUB_RAW_URL) }
+    single { createApiService<GithubApiServices>(get(), Const.Url.GITHUB_API_URL) }
 }
 
 fun createOkHttpClient(): OkHttpClient {
@@ -45,6 +48,7 @@ fun createRetrofit(
     converterFactory: MoshiConverterFactory
 ): Retrofit.Builder {
     return Retrofit.Builder()
+        .addConverterFactory(ScalarsConverterFactory.create())
         .addConverterFactory(converterFactory)
         .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
         .client(okHttpClient)
diff --git a/app/src/main/java/com/topjohnwu/magisk/di/RepositoryModule.kt b/app/src/main/java/com/topjohnwu/magisk/di/RepositoryModule.kt
index 6b62c6d01..e1cad742f 100644
--- a/app/src/main/java/com/topjohnwu/magisk/di/RepositoryModule.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/di/RepositoryModule.kt
@@ -1,15 +1,15 @@
 package com.topjohnwu.magisk.di
 
 import com.topjohnwu.magisk.data.repository.AppRepository
-import com.topjohnwu.magisk.data.repository.FileRepository
 import com.topjohnwu.magisk.data.repository.LogRepository
 import com.topjohnwu.magisk.data.repository.MagiskRepository
+import com.topjohnwu.magisk.data.repository.StringRepository
 import org.koin.dsl.module
 
 
 val repositoryModule = module {
-    single { MagiskRepository(get(), get(), get()) }
+    single { MagiskRepository(get(), get()) }
     single { LogRepository(get()) }
     single { AppRepository(get()) }
-    single { FileRepository(get()) }
+    single { StringRepository(get()) }
 }
diff --git a/app/src/main/java/com/topjohnwu/magisk/model/download/RemoteFileService.kt b/app/src/main/java/com/topjohnwu/magisk/model/download/RemoteFileService.kt
index 5d66f84b3..e0309e837 100644
--- a/app/src/main/java/com/topjohnwu/magisk/model/download/RemoteFileService.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/model/download/RemoteFileService.kt
@@ -5,7 +5,7 @@ import androidx.core.app.NotificationCompat
 import com.skoumal.teanity.extensions.subscribeK
 import com.topjohnwu.magisk.Config
 import com.topjohnwu.magisk.R
-import com.topjohnwu.magisk.data.repository.FileRepository
+import com.topjohnwu.magisk.data.network.GithubRawServices
 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
@@ -24,10 +24,10 @@ import java.io.InputStream
 
 abstract class RemoteFileService : NotificationService() {
 
-    private val repo by inject<FileRepository>()
+    private val service: GithubRawServices by inject()
 
     private val supportedFolders
-        get() = listOfNotNull(
+        get() = listOf(
             cacheDir,
             Config.downloadDirectory
         )
@@ -68,11 +68,11 @@ abstract class RemoteFileService : NotificationService() {
         }
     }
 
-    private fun download(subject: DownloadSubject) = repo.downloadFile(subject.url)
+    private fun download(subject: DownloadSubject) = service.fetchFile(subject.url)
         .map { it.toStream(subject.hashCode()) }
         .flatMap { stream ->
             when (subject) {
-                is Module -> repo.downloadInstaller()
+                is Module -> service.fetchInstaller()
                         .map { stream.toModule(subject.file, it.byteStream()); subject.file }
                 else -> Single.fromCallable { stream.writeTo(subject.file); subject.file }
             }
diff --git a/app/src/main/java/com/topjohnwu/magisk/model/entity/OldBaseModule.java b/app/src/main/java/com/topjohnwu/magisk/model/entity/OldBaseModule.java
deleted file mode 100644
index a8556e65c..000000000
--- a/app/src/main/java/com/topjohnwu/magisk/model/entity/OldBaseModule.java
+++ /dev/null
@@ -1,146 +0,0 @@
-package com.topjohnwu.magisk.model.entity;
-
-import android.content.ContentValues;
-import android.database.Cursor;
-import android.os.Parcel;
-import android.os.Parcelable;
-
-import androidx.annotation.NonNull;
-
-import java.util.List;
-
-public abstract class OldBaseModule implements Comparable<OldBaseModule>, Parcelable {
-
-    private String mId, mName, mVersion, mAuthor, mDescription;
-    private int mVersionCode = -1;
-
-    protected OldBaseModule() {
-        mId = mName = mVersion = mAuthor = mDescription = "";
-    }
-
-    protected OldBaseModule(Cursor c) {
-        mId = nonNull(c.getString(c.getColumnIndex("id")));
-        mName = nonNull(c.getString(c.getColumnIndex("name")));
-        mVersion = nonNull(c.getString(c.getColumnIndex("version")));
-        mVersionCode = c.getInt(c.getColumnIndex("versionCode"));
-        mAuthor = nonNull(c.getString(c.getColumnIndex("author")));
-        mDescription = nonNull(c.getString(c.getColumnIndex("description")));
-    }
-
-    protected OldBaseModule(Parcel p) {
-        mId = p.readString();
-        mName = p.readString();
-        mVersion = p.readString();
-        mAuthor = p.readString();
-        mDescription = p.readString();
-        mVersionCode = p.readInt();
-    }
-
-    @Override
-    public int compareTo(@NonNull OldBaseModule module) {
-        return getName().toLowerCase().compareTo(module.getName().toLowerCase());
-    }
-
-    @Override
-    public int describeContents() {
-        return 0;
-    }
-
-    @Override
-    public void writeToParcel(Parcel dest, int flags) {
-        dest.writeString(mId);
-        dest.writeString(mName);
-        dest.writeString(mVersion);
-        dest.writeString(mAuthor);
-        dest.writeString(mDescription);
-        dest.writeInt(mVersionCode);
-    }
-
-    private String nonNull(String s) {
-        return s == null ? "" : s;
-    }
-
-    public ContentValues getContentValues() {
-        ContentValues values = new ContentValues();
-        values.put("id", mId);
-        values.put("name", mName);
-        values.put("version", mVersion);
-        values.put("versionCode", mVersionCode);
-        values.put("author", mAuthor);
-        values.put("description", mDescription);
-        return values;
-    }
-
-    protected void parseProps(List<String> props) {
-        parseProps(props.toArray(new String[0]));
-    }
-
-    protected void parseProps(String[] props) throws NumberFormatException {
-        for (String line : props) {
-            String[] prop = line.split("=", 2);
-            if (prop.length != 2)
-                continue;
-
-            String key = prop[0].trim();
-            String value = prop[1].trim();
-            if (key.isEmpty() || key.charAt(0) == '#')
-                continue;
-
-            switch (key) {
-                case "id":
-                    mId = value;
-                    break;
-                case "name":
-                    mName = value;
-                    break;
-                case "version":
-                    mVersion = value;
-                    break;
-                case "versionCode":
-                    mVersionCode = Integer.parseInt(value);
-                    break;
-                case "author":
-                    mAuthor = value;
-                    break;
-                case "description":
-                    mDescription = value;
-                    break;
-                default:
-                    break;
-            }
-        }
-    }
-
-    public String getName() {
-        return mName;
-    }
-
-    public void setName(String name) {
-        mName = name;
-    }
-
-    public String getVersion() {
-        return mVersion;
-    }
-
-    public String getAuthor() {
-        return mAuthor;
-    }
-
-    public String getId() {
-        return mId;
-    }
-
-    public void setId(String id) {
-        mId = id;
-    }
-
-    public String getDescription() {
-        return mDescription;
-    }
-
-    public int getVersionCode() {
-        return mVersionCode;
-    }
-
-}
diff --git a/app/src/main/java/com/topjohnwu/magisk/model/entity/Repo.java b/app/src/main/java/com/topjohnwu/magisk/model/entity/Repo.java
deleted file mode 100644
index e16b0ef26..000000000
--- a/app/src/main/java/com/topjohnwu/magisk/model/entity/Repo.java
+++ /dev/null
@@ -1,110 +0,0 @@
-package com.topjohnwu.magisk.model.entity;
-
-import android.content.ContentValues;
-import android.database.Cursor;
-import android.os.Parcel;
-import android.os.Parcelable;
-
-import com.topjohnwu.magisk.Const;
-import com.topjohnwu.magisk.utils.Utils;
-import com.topjohnwu.magisk.utils.XStringKt;
-
-import java.text.DateFormat;
-import java.util.Date;
-
-public class Repo extends OldBaseModule {
-
-    private Date mLastUpdate;
-
-    public Repo(String id) {
-        setId(id);
-    }
-
-    public Repo(Cursor c) {
-        super(c);
-        mLastUpdate = new Date(c.getLong(c.getColumnIndex("last_update")));
-    }
-
-    public Repo(Parcel p) {
-        super(p);
-        mLastUpdate = new Date(p.readLong());
-    }
-
-    public static final Parcelable.Creator<Repo> CREATOR = new Parcelable.Creator<Repo>() {
-
-        @Override
-        public Repo createFromParcel(Parcel source) {
-            return new Repo(source);
-        }
-
-        @Override
-        public Repo[] newArray(int size) {
-            return new Repo[size];
-        }
-    };
-
-    @Override
-    public void writeToParcel(Parcel dest, int flags) {
-        super.writeToParcel(dest, flags);
-        dest.writeLong(mLastUpdate.getTime());
-    }
-
-    public void update() throws IllegalRepoException {
-        String[] props = Utils.INSTANCE.dlString(getPropUrl()).split("\\n");
-        try {
-            parseProps(props);
-        } catch (NumberFormatException e) {
-            throw new IllegalRepoException("Repo [" + getId() + "] parse error: " + e.getMessage());
-        }
-
-        if (getVersionCode() < 0) {
-            throw new IllegalRepoException("Repo [" + getId() + "] does not contain versionCode");
-        }
-    }
-
-    public void update(Date lastUpdate) throws IllegalRepoException {
-        mLastUpdate = lastUpdate;
-        update();
-    }
-
-    @Override
-    public ContentValues getContentValues() {
-        ContentValues values = super.getContentValues();
-        values.put("last_update", mLastUpdate.getTime());
-        return values;
-    }
-
-    public String getZipUrl() {
-        return String.format(Const.Url.ZIP_URL, getId());
-    }
-
-    public String getPropUrl() {
-        return getFileUrl("module.prop");
-    }
-
-    public String getDetailUrl() {
-        return getFileUrl("README.md");
-    }
-
-    public String getFileUrl(String file) {
-        return String.format(Const.Url.FILE_URL, getId(), file);
-    }
-
-    public String getLastUpdateString() {
-        return DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.MEDIUM).format(mLastUpdate);
-    }
-
-    public Date getLastUpdate() {
-        return mLastUpdate;
-    }
-
-    public String getDownloadFilename() {
-        return XStringKt.legalFilename(getName() + "-" + getVersion() + ".zip");
-    }
-
-    public static class IllegalRepoException extends Exception {
-        IllegalRepoException(String message) {
-            super(message);
-        }
-    }
-}
diff --git a/app/src/main/java/com/topjohnwu/magisk/model/entity/internal/DownloadSubject.kt b/app/src/main/java/com/topjohnwu/magisk/model/entity/internal/DownloadSubject.kt
index 44f420414..aaa1ad6e9 100644
--- a/app/src/main/java/com/topjohnwu/magisk/model/entity/internal/DownloadSubject.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/model/entity/internal/DownloadSubject.kt
@@ -5,7 +5,7 @@ import android.os.Parcelable
 import com.topjohnwu.magisk.Config
 import com.topjohnwu.magisk.Info
 import com.topjohnwu.magisk.model.entity.MagiskJson
-import com.topjohnwu.magisk.model.entity.Repo
+import com.topjohnwu.magisk.model.entity.module.Repo
 import com.topjohnwu.magisk.utils.cachedFile
 import com.topjohnwu.magisk.utils.get
 import kotlinx.android.parcel.IgnoredOnParcel
@@ -20,8 +20,8 @@ sealed class DownloadSubject : Parcelable {
 
     @Parcelize
     data class Module(
-        val module: Repo,
-        val configuration: Configuration
+            val module: Repo,
+            val configuration: Configuration
     ) : DownloadSubject() {
         override val url: String get() = module.zipUrl
 
diff --git a/app/src/main/java/com/topjohnwu/magisk/model/entity/module/BaseModule.kt b/app/src/main/java/com/topjohnwu/magisk/model/entity/module/BaseModule.kt
new file mode 100644
index 000000000..55004495a
--- /dev/null
+++ b/app/src/main/java/com/topjohnwu/magisk/model/entity/module/BaseModule.kt
@@ -0,0 +1,41 @@
+package com.topjohnwu.magisk.model.entity.module
+
+abstract class BaseModule : Comparable<BaseModule> {
+    abstract var id: String
+        protected set
+    abstract var name: String
+        protected set
+    abstract var author: String
+        protected set
+    abstract var version: String
+        protected set
+    abstract var versionCode: Int
+        protected set
+    abstract var description: String
+        protected set
+
+    @Throws(NumberFormatException::class)
+    protected fun parseProps(props: List<String>) {
+        for (line in props) {
+            val prop = line.split("=".toRegex(), 2).map { it.trim() }
+            if (prop.size != 2)
+                continue
+
+            val key = prop[0]
+            val value = prop[1]
+            if (key.isEmpty() || key[0] == '#')
+                continue
+
+            when (key) {
+                "id" -> id = value
+                "name" -> name = value
+                "version" -> version = value
+                "versionCode" -> versionCode = value.toInt()
+                "author" -> author = value
+                "description" -> description = value
+            }
+        }
+    }
+
+    override operator fun compareTo(other: BaseModule) = name.compareTo(other.name, true)
+}
diff --git a/app/src/main/java/com/topjohnwu/magisk/model/entity/MagiskModule.kt b/app/src/main/java/com/topjohnwu/magisk/model/entity/module/Module.kt
similarity index 61%
rename from app/src/main/java/com/topjohnwu/magisk/model/entity/MagiskModule.kt
rename to app/src/main/java/com/topjohnwu/magisk/model/entity/module/Module.kt
index 5846388e9..8b7d5fa3b 100644
--- a/app/src/main/java/com/topjohnwu/magisk/model/entity/MagiskModule.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/model/entity/module/Module.kt
@@ -1,50 +1,10 @@
-package com.topjohnwu.magisk.model.entity
+package com.topjohnwu.magisk.model.entity.module
 
 import androidx.annotation.WorkerThread
 import com.topjohnwu.magisk.Const
 import com.topjohnwu.superuser.Shell
 import com.topjohnwu.superuser.io.SuFile
 
-abstract class BaseModule : Comparable<BaseModule> {
-    abstract var id: String
-        protected set
-    abstract var name: String
-        protected set
-    abstract var author: String
-        protected set
-    abstract var version: String
-        protected set
-    abstract var versionCode: Int
-        protected set
-    abstract var description: String
-        protected set
-
-    @Throws(NumberFormatException::class)
-    protected fun parseProps(props: List<String>) {
-        for (line in props) {
-            val prop = line.split("=".toRegex(), 2).map { it.trim() }
-            if (prop.size != 2)
-                continue
-
-            val key = prop[0]
-            val value = prop[1]
-            if (key.isEmpty() || key[0] == '#')
-                continue
-
-            when (key) {
-                "id" -> id = value
-                "name" -> name = value
-                "version" -> version = value
-                "versionCode" -> versionCode = value.toInt()
-                "author" -> author = value
-                "description" -> description = value
-            }
-        }
-    }
-
-    override operator fun compareTo(other: BaseModule) = name.compareTo(other.name, true)
-}
-
 class Module(path: String) : BaseModule() {
     override var id: String = ""
     override var name: String = ""
diff --git a/app/src/main/java/com/topjohnwu/magisk/model/entity/module/Repo.kt b/app/src/main/java/com/topjohnwu/magisk/model/entity/module/Repo.kt
new file mode 100644
index 000000000..88f478989
--- /dev/null
+++ b/app/src/main/java/com/topjohnwu/magisk/model/entity/module/Repo.kt
@@ -0,0 +1,68 @@
+package com.topjohnwu.magisk.model.entity.module
+
+import android.os.Parcelable
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+import com.topjohnwu.magisk.Const
+import com.topjohnwu.magisk.data.repository.StringRepository
+import com.topjohnwu.magisk.utils.get
+import com.topjohnwu.magisk.utils.legalFilename
+import kotlinx.android.parcel.Parcelize
+import java.text.DateFormat
+import java.util.*
+
+@Entity(tableName = "repos")
+@Parcelize
+data class Repo(
+    @PrimaryKey override var id: String,
+    override var name: String,
+    override var author: String,
+    override var version: String,
+    override var versionCode: Int,
+    override var description: String,
+    var last_update: Long
+) : BaseModule(), Parcelable {
+
+    private val stringRepo: StringRepository get() = get()
+
+    val lastUpdate get() = Date(last_update)
+
+    val lastUpdateString: String get() =
+        DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.MEDIUM).format(lastUpdate)
+
+    val downloadFilename: String get() = "$name-$version.zip".legalFilename()
+
+    val readme get() = stringRepo.getReadme(this)
+
+    val zipUrl: String get() = Const.Url.ZIP_URL.format(id)
+
+    constructor(id: String) : this(id, "", "", "", -1, "", 0)
+
+    @Throws(IllegalRepoException::class)
+    fun update() {
+        val props = runCatching {
+            stringRepo.getMetadata(this).blockingGet()
+                    .orEmpty().split("\\n".toRegex()).dropLastWhile { it.isEmpty() }
+        }.getOrElse {
+            throw IllegalRepoException("Repo [$id] module.prop download error: " + it.message)
+        }
+
+        props.runCatching {
+            parseProps(this)
+        }.onFailure {
+            throw IllegalRepoException("Repo [$id] parse error: " + it.message)
+        }
+
+        if (versionCode < 0) {
+            throw IllegalRepoException("Repo [$id] does not contain versionCode")
+        }
+    }
+
+    @Throws(IllegalRepoException::class)
+    fun update(lastUpdate: Date) {
+        last_update = lastUpdate.time
+        update()
+    }
+
+    class IllegalRepoException(message: String) : Exception(message)
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/topjohnwu/magisk/model/entity/recycler/ModuleRvItem.kt b/app/src/main/java/com/topjohnwu/magisk/model/entity/recycler/ModuleRvItem.kt
index 2b49c6672..71c2d8ec8 100644
--- a/app/src/main/java/com/topjohnwu/magisk/model/entity/recycler/ModuleRvItem.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/model/entity/recycler/ModuleRvItem.kt
@@ -6,8 +6,8 @@ import com.skoumal.teanity.databinding.ComparableRvItem
 import com.skoumal.teanity.extensions.addOnPropertyChangedCallback
 import com.skoumal.teanity.util.KObservableField
 import com.topjohnwu.magisk.R
-import com.topjohnwu.magisk.model.entity.Module
-import com.topjohnwu.magisk.model.entity.Repo
+import com.topjohnwu.magisk.model.entity.module.Module
+import com.topjohnwu.magisk.model.entity.module.Repo
 import com.topjohnwu.magisk.utils.get
 import com.topjohnwu.magisk.utils.toggle
 
@@ -69,11 +69,7 @@ class RepoRvItem(val item: Repo) : ComparableRvItem<RepoRvItem>() {
 
     override val layoutRes: Int = R.layout.item_repo
 
-    override fun contentSameAs(other: RepoRvItem): Boolean = item.version == other.item.version
-            && item.lastUpdate == other.item.lastUpdate
-            && item.versionCode == other.item.versionCode
-            && item.description == other.item.description
-            && item.detailUrl == other.item.detailUrl
+    override fun contentSameAs(other: RepoRvItem): Boolean = item == other.item
 
     override fun itemSameAs(other: RepoRvItem): Boolean = item.id == other.item.id
 }
\ No newline at end of file
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 a47adff93..bec22b81f 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
@@ -3,7 +3,7 @@ package com.topjohnwu.magisk.model.events
 import android.app.Activity
 import com.skoumal.teanity.viewevents.ViewEvent
 import com.topjohnwu.magisk.model.entity.Policy
-import com.topjohnwu.magisk.model.entity.Repo
+import com.topjohnwu.magisk.model.entity.module.Repo
 import io.reactivex.subjects.PublishSubject
 
 
diff --git a/app/src/main/java/com/topjohnwu/magisk/tasks/RepoUpdater.kt b/app/src/main/java/com/topjohnwu/magisk/tasks/RepoUpdater.kt
new file mode 100644
index 000000000..896bb13c3
--- /dev/null
+++ b/app/src/main/java/com/topjohnwu/magisk/tasks/RepoUpdater.kt
@@ -0,0 +1,95 @@
+package com.topjohnwu.magisk.tasks
+
+import com.squareup.moshi.Json
+import com.topjohnwu.magisk.Const
+import com.topjohnwu.magisk.data.database.RepoDao
+import com.topjohnwu.magisk.data.network.GithubApiServices
+import com.topjohnwu.magisk.model.entity.module.Repo
+import io.reactivex.Flowable
+import io.reactivex.schedulers.Schedulers
+import se.ansman.kotshi.JsonSerializable
+import timber.log.Timber
+import java.net.HttpURLConnection
+import java.text.SimpleDateFormat
+import java.util.*
+import kotlin.collections.HashSet
+
+class RepoUpdater(
+    private val api: GithubApiServices,
+    private val repoDB: RepoDao
+) {
+    private lateinit var cached: MutableSet<String>
+
+    private val dateFormat: SimpleDateFormat
+        get() {
+            val format = SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'", Locale.US)
+            format.timeZone = TimeZone.getTimeZone("UTC")
+            return format
+        }
+
+    private fun loadRepos(repos: List<GithubRepoInfo>) = Flowable.fromIterable(repos)
+            .parallel().runOn(Schedulers.io()).map {
+                it.id to dateFormat.parse(it.pushed_at)!!
+            }.map {
+                // Skip submission
+                if (it.first == "submission")
+                    return@map
+                (repoDB.getRepo(it.first)?.apply {
+                    cached.remove(it.first)
+                } ?: Repo(it.first)).runCatching {
+                    update(it.second)
+                    repoDB.addRepo(this)
+                }.getOrElse { Timber.e(it) }
+            }.sequential()
+
+    private fun loadPage(page: Int, etag: String = ""): Flowable<Unit> =
+        api.fetchRepos(page, etag).flatMap {
+            it.error()?.also { throw it }
+            it.response()?.run {
+                if (code() == HttpURLConnection.HTTP_NOT_MODIFIED)
+                    throw CachedException()
+
+                if (page == 1)
+                    repoDB.etagKey = headers()[Const.Key.ETAG_KEY].orEmpty().trimEtag()
+
+                val flow = loadRepos(body()!!)
+                if (headers()[Const.Key.LINK_KEY].orEmpty().contains("next")) {
+                    flow.mergeWith(loadPage(page + 1))
+                } else {
+                    flow
+                }
+            }
+        }
+
+    private fun forcedReload() = Flowable.fromIterable(cached)
+            .parallel().runOn(Schedulers.io()).map {
+                runCatching {
+                    Repo(it).update()
+                }.getOrElse { Timber.e(it) }
+            }.sequential()
+
+    private fun String.trimEtag() = substring(indexOf('\"'), lastIndexOf('\"') + 1)
+
+    operator fun invoke(forced: Boolean = false) : Flowable<Unit> {
+        cached = Collections.synchronizedSet(HashSet(repoDB.repoIDSet))
+        return loadPage(1, repoDB.etagKey).doOnComplete {
+            repoDB.removeRepos(cached.toList())
+            cached.clear()
+        }.onErrorResumeNext { it: Throwable ->
+            cached.clear()
+            if (it is CachedException) {
+                if (forced) forcedReload() else Flowable.empty()
+            } else {
+                Flowable.error(it)
+            }
+        }
+    }
+
+    class CachedException : Exception()
+}
+
+@JsonSerializable
+data class GithubRepoInfo(
+    @Json(name = "name") val id: String,
+    val pushed_at: String
+)
\ No newline at end of file
diff --git a/app/src/main/java/com/topjohnwu/magisk/tasks/UpdateRepos.java b/app/src/main/java/com/topjohnwu/magisk/tasks/UpdateRepos.java
deleted file mode 100644
index a4a9bd953..000000000
--- a/app/src/main/java/com/topjohnwu/magisk/tasks/UpdateRepos.java
+++ /dev/null
@@ -1,191 +0,0 @@
-package com.topjohnwu.magisk.tasks;
-
-import android.database.Cursor;
-import android.util.Pair;
-
-import com.topjohnwu.magisk.App;
-import com.topjohnwu.magisk.Config;
-import com.topjohnwu.magisk.Const;
-import com.topjohnwu.magisk.data.database.RepoDatabaseHelper;
-import com.topjohnwu.magisk.model.entity.Repo;
-import com.topjohnwu.magisk.utils.Logger;
-import com.topjohnwu.magisk.utils.Utils;
-import com.topjohnwu.net.Networking;
-import com.topjohnwu.net.Request;
-
-import org.json.JSONArray;
-import org.json.JSONException;
-import org.json.JSONObject;
-
-import java.net.HttpURLConnection;
-import java.text.ParseException;
-import java.text.SimpleDateFormat;
-import java.util.Collections;
-import java.util.Date;
-import java.util.Locale;
-import java.util.Queue;
-import java.util.Set;
-import java.util.TimeZone;
-import java.util.concurrent.ConcurrentLinkedQueue;
-import java.util.concurrent.ExecutionException;
-import java.util.concurrent.Future;
-
-import androidx.annotation.NonNull;
-import io.reactivex.Single;
-
-@Deprecated
-public class UpdateRepos {
-
-    @NonNull
-    private final RepoDatabaseHelper repoDB;
-    private Set<String> cached;
-    private Queue<Pair<String, Date>> moduleQueue;
-
-    public UpdateRepos(@NonNull RepoDatabaseHelper repoDatabase) {
-        repoDB = repoDatabase;
-    }
-
-    private void runTasks(Runnable task) {
-        Future[] futures = new Future[App.THREAD_POOL.getMaximumPoolSize() - 1];
-        for (int i = 0; i < futures.length; ++i) {
-            futures[i] = App.THREAD_POOL.submit(task);
-        }
-        for (Future f : futures) {
-            while (true) {
-                try {
-                    f.get();
-                } catch (InterruptedException e) {
-                    continue;
-                } catch (ExecutionException ignored) {
-                }
-                break;
-            }
-        }
-    }
-
-    /**
-     * Static instance of (Simple)DateFormat is not threadsafe so in order to make it safe it needs
-     * to be created beforehand on the same thread where it'll be used.
-     * See https://stackoverflow.com/a/18383395
-     */
-    private static SimpleDateFormat getDateFormat() {
-        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'", Locale.US);
-        format.setTimeZone(TimeZone.getTimeZone("UTC"));
-        return format;
-    }
-
-    /* We sort repos by last push, which means that we only need to check whether the
-     * first page is updated to determine whether the online repo database is changed
-     */
-    private boolean parsePage(int page) {
-        Request req = Networking.get(Utils.INSTANCE.fmt(Const.Url.REPO_URL, page + 1));
-        if (page == 0) {
-            String etag = Config.getEtagKey();
-            if (!etag.isEmpty())
-                req.addHeaders(Const.Key.IF_NONE_MATCH, etag);
-        }
-        Request.Result<JSONArray> res = req.execForJSONArray();
-        // JSON not updated
-        if (res.getCode() == HttpURLConnection.HTTP_NOT_MODIFIED)
-            return false;
-        // Network error
-        if (res.getResult() == null) {
-            cached.clear();
-            return true;
-        }
-        // Current page is the last page
-        if (res.getResult().length() == 0)
-            return true;
-
-        try {
-            SimpleDateFormat dateFormat = getDateFormat();
-
-            for (int i = 0; i < res.getResult().length(); i++) {
-                JSONObject rawRepo = res.getResult().getJSONObject(i);
-                String id = rawRepo.getString("name");
-                Date date = dateFormat.parse(rawRepo.getString("pushed_at"));
-                moduleQueue.offer(new Pair<>(id, date));
-            }
-        } catch (JSONException | ParseException e) {
-            // Should not happen, but if exception occurs, page load fails
-            return false;
-        }
-
-        // Update ETAG
-        if (page == 0) {
-            String etag = res.getConnection().getHeaderField(Config.Key.ETAG_KEY);
-            if (etag != null) {
-                etag = etag.substring(etag.indexOf('\"'), etag.lastIndexOf('\"') + 1);
-                Config.setEtagKey(etag);
-            }
-        }
-
-        String links = res.getConnection().getHeaderField(Const.Key.LINK_KEY);
-        return links == null || !links.contains("next") || parsePage(page + 1);
-    }
-
-    private boolean loadPages() {
-        if (!parsePage(0))
-            return false;
-        runTasks(() -> {
-            while (true) {
-                Pair<String, Date> pair = moduleQueue.poll();
-                if (pair == null)
-                    return;
-                Repo repo = repoDB.getRepo(pair.first);
-                try {
-                    if (repo == null)
-                        repo = new Repo(pair.first);
-                    else
-                        cached.remove(pair.first);
-                    repo.update(pair.second);
-                    repoDB.addRepo(repo);
-                } catch (Repo.IllegalRepoException e) {
-                    Logger.debug(e.getMessage());
-                    repoDB.removeRepo(pair.first);
-                }
-            }
-        });
-        return true;
-    }
-
-    private void fullReload() {
-        Cursor c = repoDB.getRawCursor();
-        runTasks(() -> {
-            while (true) {
-                Repo repo;
-                synchronized (c) {
-                    if (!c.moveToNext())
-                        return;
-                    repo = new Repo(c);
-                }
-                try {
-                    repo.update();
-                    repoDB.addRepo(repo);
-                } catch (Repo.IllegalRepoException e) {
-                    Logger.debug(e.getMessage());
-                    repoDB.removeRepo(repo);
-                }
-            }
-        });
-    }
-
-    public Single<Boolean> exec(boolean force) {
-        return Single.fromCallable(() -> {
-            cached = Collections.synchronizedSet(repoDB.getRepoIDSet());
-            moduleQueue = new ConcurrentLinkedQueue<>();
-
-            if (loadPages()) {
-                // The leftover cached means they are removed from online repo
-                repoDB.removeRepo(cached);
-            } else if (force) {
-                fullReload();
-            }
-            return force; // not important
-        });
-    }
-
-    public Single<Boolean> exec() {
-        return exec(false);
-    }
-}
diff --git a/app/src/main/java/com/topjohnwu/magisk/ui/module/ModuleViewModel.kt b/app/src/main/java/com/topjohnwu/magisk/ui/module/ModuleViewModel.kt
index 74ba92c45..0766b5bed 100644
--- a/app/src/main/java/com/topjohnwu/magisk/ui/module/ModuleViewModel.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/ui/module/ModuleViewModel.kt
@@ -9,18 +9,16 @@ import com.skoumal.teanity.util.DiffObservableList
 import com.skoumal.teanity.util.KObservableField
 import com.topjohnwu.magisk.BR
 import com.topjohnwu.magisk.R
-import com.topjohnwu.magisk.data.database.RepoDatabaseHelper
-import com.topjohnwu.magisk.model.entity.Module
-import com.topjohnwu.magisk.model.entity.Repo
+import com.topjohnwu.magisk.data.database.RepoDao
+import com.topjohnwu.magisk.model.entity.module.Module
 import com.topjohnwu.magisk.model.entity.recycler.ModuleRvItem
 import com.topjohnwu.magisk.model.entity.recycler.RepoRvItem
 import com.topjohnwu.magisk.model.entity.recycler.SectionRvItem
 import com.topjohnwu.magisk.model.events.InstallModuleEvent
 import com.topjohnwu.magisk.model.events.OpenChangelogEvent
 import com.topjohnwu.magisk.model.events.OpenFilePickerEvent
-import com.topjohnwu.magisk.tasks.UpdateRepos
+import com.topjohnwu.magisk.tasks.RepoUpdater
 import com.topjohnwu.magisk.ui.base.MagiskViewModel
-import com.topjohnwu.magisk.utils.toList
 import com.topjohnwu.magisk.utils.toSingle
 import com.topjohnwu.magisk.utils.update
 import io.reactivex.Single
@@ -28,9 +26,9 @@ import io.reactivex.disposables.Disposable
 import me.tatarka.bindingcollectionadapter2.OnItemBind
 
 class ModuleViewModel(
-        private val resources: Resources,
-        private val repoDatabase: RepoDatabaseHelper,
-        private val repoUpdater: UpdateRepos
+    private val resources: Resources,
+    private val repoUpdater: RepoUpdater,
+    private val repoDB: RepoDao
 ) : MagiskViewModel() {
 
     val query = KObservableField("")
@@ -65,9 +63,10 @@ class ModuleViewModel(
             .toList()
             .map { it to itemsInstalled.calculateDiff(it) }
             .doOnSuccessUi { itemsInstalled.update(it.first, it.second) }
-            .flatMap { repoUpdater.exec(force) }
-            .flatMap { Single.fromCallable { repoDatabase.repoCursor.toList { Repo(it) } } }
-            .flattenAsFlowable { it }
+            .toFlowable()
+            .flatMap { repoUpdater(force) }
+            .collect({}, {_, _ -> })
+            .flattenAsFlowable { repoDB.repos }
             .map { RepoRvItem(it) }
             .toList()
             .doOnSuccess { allItems.update(it) }
diff --git a/app/src/main/java/com/topjohnwu/magisk/ui/module/ReposFragment.kt b/app/src/main/java/com/topjohnwu/magisk/ui/module/ReposFragment.kt
index 191122be7..f2f4b1839 100644
--- a/app/src/main/java/com/topjohnwu/magisk/ui/module/ReposFragment.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/ui/module/ReposFragment.kt
@@ -11,7 +11,7 @@ import com.topjohnwu.magisk.Config
 import com.topjohnwu.magisk.R
 import com.topjohnwu.magisk.databinding.FragmentReposBinding
 import com.topjohnwu.magisk.model.download.DownloadService
-import com.topjohnwu.magisk.model.entity.Repo
+import com.topjohnwu.magisk.model.entity.module.Repo
 import com.topjohnwu.magisk.model.entity.internal.Configuration
 import com.topjohnwu.magisk.model.entity.internal.DownloadSubject
 import com.topjohnwu.magisk.model.events.InstallModuleEvent
@@ -89,7 +89,7 @@ class ReposFragment : MagiskFragment<ModuleViewModel, FragmentReposBinding>(),
     }
 
     private fun openChangelog(item: Repo) {
-        MarkDownWindow.show(requireActivity(), null, item.detailUrl)
+        MarkDownWindow.show(requireActivity(), null, item.readme)
     }
 
     @SuppressLint("MissingPermission")
diff --git a/app/src/main/java/com/topjohnwu/magisk/ui/settings/SettingsFragment.kt b/app/src/main/java/com/topjohnwu/magisk/ui/settings/SettingsFragment.kt
index 71564b1da..178c822f9 100644
--- a/app/src/main/java/com/topjohnwu/magisk/ui/settings/SettingsFragment.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/ui/settings/SettingsFragment.kt
@@ -8,7 +8,6 @@ import android.view.LayoutInflater
 import android.widget.EditText
 import android.widget.Toast
 import androidx.appcompat.app.AlertDialog
-import androidx.core.content.edit
 import androidx.databinding.DataBindingUtil
 import androidx.preference.ListPreference
 import androidx.preference.Preference
@@ -20,7 +19,7 @@ import com.topjohnwu.magisk.BuildConfig
 import com.topjohnwu.magisk.Config
 import com.topjohnwu.magisk.Const
 import com.topjohnwu.magisk.R
-import com.topjohnwu.magisk.data.database.RepoDatabaseHelper
+import com.topjohnwu.magisk.data.database.RepoDao
 import com.topjohnwu.magisk.databinding.CustomDownloadDialogBinding
 import com.topjohnwu.magisk.model.observer.Observer
 import com.topjohnwu.magisk.ui.base.BasePreferenceFragment
@@ -33,7 +32,7 @@ import java.io.File
 
 class SettingsFragment : BasePreferenceFragment() {
 
-    private val repoDatabase: RepoDatabaseHelper by inject()
+    private val repoDB: RepoDao by inject()
 
     private lateinit var updateChannel: ListPreference
     private lateinit var autoRes: ListPreference
@@ -76,10 +75,7 @@ class SettingsFragment : BasePreferenceFragment() {
             true
         }
         findPreference("clear").setOnPreferenceClickListener {
-            prefs.edit {
-                remove(Config.Key.ETAG_KEY)
-            }
-            repoDatabase.clearRepo()
+            repoDB.clear()
             Utils.toast(R.string.repo_cache_cleared, Toast.LENGTH_SHORT)
             true
         }
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 6f5de3ab1..9f8f17324 100644
--- a/app/src/main/java/com/topjohnwu/magisk/view/MarkDownWindow.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/view/MarkDownWindow.kt
@@ -4,9 +4,11 @@ import android.content.Context
 import android.view.LayoutInflater
 import android.widget.TextView
 import androidx.appcompat.app.AlertDialog
+import com.skoumal.teanity.extensions.subscribeK
 import com.topjohnwu.magisk.R
-import com.topjohnwu.net.Networking
-import com.topjohnwu.net.ResponseListener
+import com.topjohnwu.magisk.data.repository.StringRepository
+import com.topjohnwu.magisk.utils.inject
+import io.reactivex.Single
 import ru.noties.markwon.Markwon
 import ru.noties.markwon.html.HtmlPlugin
 import ru.noties.markwon.image.ImagesPlugin
@@ -16,20 +18,22 @@ import java.util.*
 
 object MarkDownWindow {
 
+    private val stringRepo: StringRepository by inject()
+
     fun show(activity: Context, title: String?, url: String) {
-        Networking.get(url).getAsString(Listener(activity, title))
+        show(activity, title, stringRepo.getString(url))
     }
 
     fun show(activity: Context, title: String?, input: InputStream) {
-        Scanner(input, "UTF-8").use {
-            it.useDelimiter("\\A")
-            Listener(activity, title).onResponse(it.next())
-        }
+        Single.just(Scanner(input, "UTF-8").apply { useDelimiter("\\A") })
+            .map { it.next() }
+            .also {
+                show(activity, title, it)
+            }
     }
 
-    internal class Listener(var activity: Context, var title: String?) : ResponseListener<String> {
-
-        override fun onResponse(md: String) {
+    fun show(activity: Context, title: String?, content: Single<String>) {
+        content.subscribeK {
             val markwon = Markwon.builder(activity)
                     .usePlugin(HtmlPlugin.create())
                     .usePlugin(ImagesPlugin.create(activity))
@@ -40,7 +44,7 @@ object MarkDownWindow {
             val mv = LayoutInflater.from(activity).inflate(R.layout.markdown_window, null)
             val tv = mv.findViewById<TextView>(R.id.md_txt)
             try {
-                markwon.setMarkdown(tv, md)
+                markwon.setMarkdown(tv, it)
             } catch (e: ExceptionInInitializerError) {
                 //Nothing we can do about this error other than show error message
                 tv.setText(R.string.download_file_error)
diff --git a/app/src/main/res/layout/item_repo.xml b/app/src/main/res/layout/item_repo.xml
index cc0ec5035..fe15c4803 100644
--- a/app/src/main/res/layout/item_repo.xml
+++ b/app/src/main/res/layout/item_repo.xml
@@ -47,7 +47,7 @@
                 android:id="@+id/version_name"
                 android:layout_width="0dp"
                 android:layout_height="wrap_content"
-                android:text="@{item.item.version == null || item.item.version.length == 0 ? @string/no_info_provided : item.item.version}"
+                android:text="@{item.item.version.length == 0 ? @string/no_info_provided : item.item.version}"
                 android:textAppearance="?android:attr/textAppearanceSmall"
                 android:textColor="@android:color/tertiary_text_dark"
                 android:textIsSelectable="false"
@@ -62,7 +62,7 @@
                 android:id="@+id/author"
                 android:layout_width="0dp"
                 android:layout_height="wrap_content"
-                android:text="@{item.item.author == null || item.item.author.length == 0 ? @string/no_info_provided : @string/author(item.item.author)}"
+                android:text="@{item.item.author.length == 0 ? @string/no_info_provided : @string/author(item.item.author)}"
                 android:textAppearance="?android:attr/textAppearanceSmall"
                 android:textColor="@android:color/tertiary_text_dark"
                 android:textIsSelectable="false"
@@ -78,7 +78,7 @@
                 android:layout_width="0dp"
                 android:layout_height="wrap_content"
                 android:layout_gravity="center_vertical"
-                android:text="@{item.item.description == null || item.item.description.length == 0 ? @string/no_info_provided : item.item.description}"
+                android:text="@{item.item.description.length == 0 ? @string/no_info_provided : item.item.description}"
                 android:textAppearance="?android:attr/textAppearanceSmall"
                 android:textIsSelectable="false"
                 app:layout_constraintBottom_toTopOf="@+id/update_time"