diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0db2f8b66..8d5e09b98 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,8 +1,9 @@
 ###Changelog
 
-###Version 0.18.0
+###Version 0.18.0 (next)
 * Added Portuguese pt_PT and pt_BR translations
 * Consistently display device specific icons already during discovery
+* Add sleep chart diplaying the last week of sleep
 
 ####Version 0.17.5
 * Automatically start the service on boot (can be turned off)
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/charts/AbstractWeekChartFragment.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/charts/AbstractWeekChartFragment.java
index b33d14cdb..0cd9a83af 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/charts/AbstractWeekChartFragment.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/charts/AbstractWeekChartFragment.java
@@ -19,6 +19,7 @@ import com.github.mikephil.charting.data.BarEntry;
 import com.github.mikephil.charting.data.PieData;
 import com.github.mikephil.charting.data.PieDataSet;
 import com.github.mikephil.charting.data.PieEntry;
+import com.github.mikephil.charting.formatter.IAxisValueFormatter;
 import com.github.mikephil.charting.formatter.IValueFormatter;
 
 import org.slf4j.Logger;
@@ -93,7 +94,7 @@ public abstract class AbstractWeekChartFragment extends AbstractChartFragment {
 
         BarDataSet set = new BarDataSet(entries, "");
         set.setColors(getColors());
-        set.setValueFormatter(getFormatter());
+        set.setValueFormatter(getBarValueFormatter());
 
         BarData barData = new BarData(set);
         barData.setValueTextColor(Color.GRAY); //prevent tearing other graph elements with the black text. Another approach would be to hide the values cmpletely with data.setDrawValues(false);
@@ -119,7 +120,7 @@ public abstract class AbstractWeekChartFragment extends AbstractChartFragment {
             entries.add(new PieEntry(value));
         }
 
-        set.setValueFormatter(getFormatter());
+        set.setValueFormatter(getPieValueFormatter());
         set.setColors(getColors());
 
         if (totalValue < mTargetValue) {
@@ -134,8 +135,6 @@ public abstract class AbstractWeekChartFragment extends AbstractChartFragment {
         return new DayData(data, formatPieValue((int) totalValue));
     }
 
-    protected abstract String formatPieValue(int value);
-
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
                              Bundle savedInstanceState) {
@@ -163,7 +162,7 @@ public abstract class AbstractWeekChartFragment extends AbstractChartFragment {
     private void setupTodayPieChart() {
         mTodayPieChart.setBackgroundColor(BACKGROUND_COLOR);
         mTodayPieChart.getDescription().setTextColor(DESCRIPTION_COLOR);
-        mTodayPieChart.getDescription().setText(getContext().getString(R.string.weeksteps_today_steps_description, String.valueOf(mTargetValue)));
+        mTodayPieChart.getDescription().setText(getPieDescription(mTargetValue));
 //        mTodayPieChart.setNoDataTextDescription("");
         mTodayPieChart.setNoDataText("");
         mTodayPieChart.getLegend().setEnabled(false);
@@ -193,7 +192,7 @@ public abstract class AbstractWeekChartFragment extends AbstractChartFragment {
         y.setDrawZeroLine(true);
         y.setSpaceBottom(0);
         y.setAxisMinimum(0);
-
+        y.setValueFormatter(getYAxisFormatter());
         y.setEnabled(true);
 
         YAxis yAxisRight = mWeekChart.getAxisRight();
@@ -291,7 +290,15 @@ public abstract class AbstractWeekChartFragment extends AbstractChartFragment {
 
     abstract float[] getTotalsForActivityAmounts(ActivityAmounts activityAmounts);
 
-    abstract IValueFormatter getFormatter();
+    abstract String formatPieValue(int value);
+
+    abstract IValueFormatter getPieValueFormatter();
+
+    abstract IValueFormatter getBarValueFormatter();
+
+    abstract IAxisValueFormatter getYAxisFormatter();
 
     abstract int[] getColors();
+
+    abstract String getPieDescription(int targetValue);
 }
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/charts/WeekSleepChartFragment.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/charts/WeekSleepChartFragment.java
index 30e1c4b55..bf237cb94 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/charts/WeekSleepChartFragment.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/charts/WeekSleepChartFragment.java
@@ -1,6 +1,8 @@
 package nodomain.freeyourgadget.gadgetbridge.activities.charts;
 
+import com.github.mikephil.charting.components.AxisBase;
 import com.github.mikephil.charting.data.Entry;
+import com.github.mikephil.charting.formatter.IAxisValueFormatter;
 import com.github.mikephil.charting.formatter.IValueFormatter;
 import com.github.mikephil.charting.utils.ViewPortHandler;
 
@@ -18,6 +20,11 @@ public class WeekSleepChartFragment extends AbstractWeekChartFragment {
         return getString(R.string.weeksleepchart_sleep_a_week);
     }
 
+    @Override
+    String getPieDescription(int targetValue) {
+        return getString(R.string.weeksleepchart_today_sleep_description, DateTimeUtils.minutesToHHMM(targetValue));
+    }
+
     @Override
     int getGoal() {
         return 8 * 60; // FIXME
@@ -43,7 +50,7 @@ public class WeekSleepChartFragment extends AbstractWeekChartFragment {
     }
 
     @Override
-    IValueFormatter getFormatter() {
+    IValueFormatter getPieValueFormatter() {
         return new IValueFormatter() {
             @Override
             public String getFormattedValue(float value, Entry entry, int dataSetIndex, ViewPortHandler viewPortHandler) {
@@ -52,6 +59,26 @@ public class WeekSleepChartFragment extends AbstractWeekChartFragment {
         };
     }
 
+    @Override
+    IValueFormatter getBarValueFormatter() {
+        return new IValueFormatter() {
+            @Override
+            public String getFormattedValue(float value, Entry entry, int dataSetIndex, ViewPortHandler viewPortHandler) {
+                return DateTimeUtils.minutesToHHMM((int) value);
+            }
+        };
+    }
+
+    @Override
+    IAxisValueFormatter getYAxisFormatter() {
+        return new IAxisValueFormatter() {
+            @Override
+            public String getFormattedValue(float value, AxisBase axis) {
+                return DateTimeUtils.minutesToHHMM((int) value);
+            }
+        };
+    }
+
     @Override
     int[] getColors() {
         return new int[]{akDeepSleep.color, akLightSleep.color};
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/charts/WeekStepsChartFragment.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/charts/WeekStepsChartFragment.java
index ee843f7bb..ea6019f6f 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/charts/WeekStepsChartFragment.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/charts/WeekStepsChartFragment.java
@@ -1,5 +1,6 @@
 package nodomain.freeyourgadget.gadgetbridge.activities.charts;
 
+import com.github.mikephil.charting.formatter.IAxisValueFormatter;
 import com.github.mikephil.charting.formatter.IValueFormatter;
 
 import nodomain.freeyourgadget.gadgetbridge.R;
@@ -14,6 +15,11 @@ public class WeekStepsChartFragment extends AbstractWeekChartFragment {
         return getString(R.string.weekstepschart_steps_a_week);
     }
 
+    @Override
+    String getPieDescription(int targetValue) {
+        return getString(R.string.weeksteps_today_steps_description, String.valueOf(targetValue));
+    }
+
     @Override
     int getGoal() {
         GBDevice device = getChartsHost().getDevice();
@@ -39,7 +45,17 @@ public class WeekStepsChartFragment extends AbstractWeekChartFragment {
     }
 
     @Override
-    IValueFormatter getFormatter() {
+    IValueFormatter getPieValueFormatter() {
+        return null;
+    }
+
+    @Override
+    IValueFormatter getBarValueFormatter() {
+        return null;
+    }
+
+    @Override
+    IAxisValueFormatter getYAxisFormatter() {
         return null;
     }
 
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/util/DateTimeUtils.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/util/DateTimeUtils.java
index 6781bcb07..6dbdf994c 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/util/DateTimeUtils.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/util/DateTimeUtils.java
@@ -78,4 +78,8 @@ public class DateTimeUtils {
     public static Calendar getCalendarUTC() {
         return GregorianCalendar.getInstance(TimeZone.getTimeZone("UTC"));
     }
+
+    public static String minutesToHHMM(int minutes) {
+        return String.format(Locale.US, "%d:%02d", minutes / 60, minutes % 60); // no I do not want to use durationformatter :P
+    }
 }
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 7e3d0d247..ec7d46008 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -278,6 +278,7 @@
     <string name="notif_battery_low_bigtext_number_of_charges">Number of charges: %s</string>
     <string name="sleepchart_your_sleep">Your Sleep</string>
     <string name="weeksleepchart_sleep_a_week">Sleep a week</string>
+    <string name="weeksleepchart_today_sleep_description">Sleep today, target: %1$s</string>
     <string name="weekstepschart_steps_a_week">Steps a week</string>
     <string name="activity_sleepchart_activity_and_sleep">Your Activity and Sleep</string>
     <string name="updating_firmware">Updating Firmware…</string>