diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index b238d986..49860022 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -24,7 +24,6 @@
     <uses-feature
         android:name="android.hardware.bluetooth_le"
         android:required="false" />
-
     <uses-feature
         android:name="android.hardware.telephony"
         android:required="false" />
@@ -48,25 +47,26 @@
         <activity
             android:name=".activities.SettingsActivity"
             android:label="@string/title_activity_settings"
-            android:parentActivityName=".activities.ControlCenter"/>
+            android:parentActivityName=".activities.ControlCenter" />
         <activity
             android:name=".devices.miband.MiBandPreferencesActivity"
             android:label="@string/preferences_miband_settings"
-            android:parentActivityName=".activities.SettingsActivity"/>
+            android:parentActivityName=".activities.SettingsActivity" />
         <activity
             android:name=".activities.AppManagerActivity"
             android:label="@string/title_activity_appmanager"
-            android:parentActivityName=".activities.ControlCenter"/>
+            android:parentActivityName=".activities.ControlCenter" />
         <activity
             android:name=".activities.AppBlacklistActivity"
             android:label="@string/title_activity_appblacklist"
-            android:parentActivityName=".activities.SettingsActivity"/>
+            android:parentActivityName=".activities.SettingsActivity" />
         <activity
             android:name=".activities.FwAppInstallerActivity"
             android:label="@string/title_activity_fw_app_insaller"
             android:parentActivityName=".activities.ControlCenter">
             <intent-filter>
                 <action android:name="android.intent.action.VIEW" />
+
                 <category android:name="android.intent.category.DEFAULT" />
 
                 <data android:mimeType="*/*" />
@@ -87,7 +87,6 @@
                 <data android:pathPattern="/.*\\..*\\..*\\..*\\..*\\..*\\..*\\..*\\.fw" />
                 <data android:pathPattern="/.*\\..*\\..*\\..*\\..*\\..*\\..*\\..*\\..*\\.fw" />
                 <data android:pathPattern="/.*\\..*\\..*\\..*\\..*\\..*\\..*\\..*\\..*\\..*\\.fw" />
-
                 <data android:pathPattern="/.*\\.pbw" />
                 <data android:pathPattern="/.*\\..*\\.pbw" />
                 <data android:pathPattern="/.*\\..*\\..*\\.pbw" />
@@ -98,7 +97,6 @@
                 <data android:pathPattern="/.*\\..*\\..*\\..*\\..*\\..*\\..*\\..*\\.pbw" />
                 <data android:pathPattern="/.*\\..*\\..*\\..*\\..*\\..*\\..*\\..*\\..*\\.pbw" />
                 <data android:pathPattern="/.*\\..*\\..*\\..*\\..*\\..*\\..*\\..*\\..*\\..*\\.pbw" />
-
                 <data android:pathPattern="/.*\\.pbz" />
                 <data android:pathPattern="/.*\\..*\\.pbz" />
                 <data android:pathPattern="/.*\\..*\\..*\\.pbz" />
@@ -109,7 +107,6 @@
                 <data android:pathPattern="/.*\\..*\\..*\\..*\\..*\\..*\\..*\\..*\\.pbz" />
                 <data android:pathPattern="/.*\\..*\\..*\\..*\\..*\\..*\\..*\\..*\\..*\\.pbz" />
                 <data android:pathPattern="/.*\\..*\\..*\\..*\\..*\\..*\\..*\\..*\\..*\\..*\\.pbz" />
-
                 <data android:pathPattern="/.*\\.pbl" />
                 <data android:pathPattern="/.*\\..*\\.pbl" />
                 <data android:pathPattern="/.*\\..*\\..*\\.pbl" />
@@ -123,6 +120,7 @@
             </intent-filter>
             <intent-filter>
                 <action android:name="android.intent.action.VIEW" />
+
                 <category android:name="android.intent.category.DEFAULT" />
 
                 <!-- no mimeType filter, needed for CM-derived ROMs? -->
@@ -142,7 +140,6 @@
                 <data android:pathPattern="/.*\\..*\\..*\\..*\\..*\\..*\\..*\\..*\\.fw" />
                 <data android:pathPattern="/.*\\..*\\..*\\..*\\..*\\..*\\..*\\..*\\..*\\.fw" />
                 <data android:pathPattern="/.*\\..*\\..*\\..*\\..*\\..*\\..*\\..*\\..*\\..*\\.fw" />
-
                 <data android:pathPattern="/.*\\.pbw" />
                 <data android:pathPattern="/.*\\..*\\.pbw" />
                 <data android:pathPattern="/.*\\..*\\..*\\.pbw" />
@@ -153,7 +150,6 @@
                 <data android:pathPattern="/.*\\..*\\..*\\..*\\..*\\..*\\..*\\..*\\.pbw" />
                 <data android:pathPattern="/.*\\..*\\..*\\..*\\..*\\..*\\..*\\..*\\..*\\.pbw" />
                 <data android:pathPattern="/.*\\..*\\..*\\..*\\..*\\..*\\..*\\..*\\..*\\..*\\.pbw" />
-
                 <data android:pathPattern="/.*\\.pbz" />
                 <data android:pathPattern="/.*\\..*\\.pbz" />
                 <data android:pathPattern="/.*\\..*\\..*\\.pbz" />
@@ -164,7 +160,6 @@
                 <data android:pathPattern="/.*\\..*\\..*\\..*\\..*\\..*\\..*\\..*\\.pbz" />
                 <data android:pathPattern="/.*\\..*\\..*\\..*\\..*\\..*\\..*\\..*\\..*\\.pbz" />
                 <data android:pathPattern="/.*\\..*\\..*\\..*\\..*\\..*\\..*\\..*\\..*\\..*\\.pbz" />
-
                 <data android:pathPattern="/.*\\.pbl" />
                 <data android:pathPattern="/.*\\..*\\.pbl" />
                 <data android:pathPattern="/.*\\..*\\..*\\.pbl" />
@@ -180,10 +175,11 @@
             <!-- to receive the firmwares from the donwload content provider -->
             <intent-filter>
                 <action android:name="android.intent.action.VIEW" />
+
                 <category android:name="android.intent.category.DEFAULT" />
+
                 <data android:mimeType="application/octet-stream" />
             </intent-filter>
-
         </activity>
 
         <service
@@ -222,11 +218,11 @@
             android:name=".activities.DebugActivity"
             android:label="@string/title_activity_debug"
             android:parentActivityName=".activities.ControlCenter"
-            android:windowSoftInputMode="stateHidden"></activity>
+            android:windowSoftInputMode="stateHidden" />
         <activity
             android:name=".activities.DiscoveryActivity"
             android:label="@string/title_activity_discovery"
-            android:parentActivityName=".activities.ControlCenter"></activity>
+            android:parentActivityName=".activities.ControlCenter" />
         <activity
             android:name=".activities.AndroidPairingActivity"
             android:label="@string/title_activity_android_pairing" />
@@ -236,16 +232,31 @@
         <activity
             android:name=".activities.charts.ChartsActivity"
             android:label="@string/title_activity_charts"
-            android:parentActivityName=".activities.ControlCenter"/>
+            android:parentActivityName=".activities.ControlCenter" />
         <activity
             android:name=".activities.ConfigureAlarms"
             android:label="@string/title_activity_set_alarm"
-            android:parentActivityName=".activities.SettingsActivity"/>
+            android:parentActivityName=".activities.SettingsActivity" />
         <activity
             android:name=".activities.AlarmDetails"
             android:label="@string/title_activity_alarm_details"
-            android:parentActivityName=".activities.ConfigureAlarms"/>
-        <provider android:authorities="com.getpebble.android.provider" android:exported="true" android:name=".contentprovider.PebbleContentProvider" />
+            android:parentActivityName=".activities.ConfigureAlarms" />
+
+        <provider
+            android:name=".contentprovider.PebbleContentProvider"
+            android:authorities="com.getpebble.android.provider"
+            android:exported="true" />
+
+        <receiver android:name=".SleepAlarmWidget">
+            <intent-filter>
+                <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
+                <action android:name="nodomain.freeyourgadget.gadgetbridge.SLEEP_ALARM_WIDGET_CLICK" />
+            </intent-filter>
+
+            <meta-data
+                android:name="android.appwidget.provider"
+                android:resource="@xml/sleep_alarm_widget_info" />
+        </receiver>
     </application>
 
 </manifest>
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/SleepAlarmWidget.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/SleepAlarmWidget.java
new file mode 100644
index 00000000..cf950dd6
--- /dev/null
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/SleepAlarmWidget.java
@@ -0,0 +1,112 @@
+package nodomain.freeyourgadget.gadgetbridge;
+
+import android.annotation.TargetApi;
+import android.app.AlarmManager;
+import android.app.PendingIntent;
+import android.appwidget.AppWidgetManager;
+import android.appwidget.AppWidgetProvider;
+import android.content.Context;
+import android.content.Intent;
+import android.os.Build;
+import android.widget.RemoteViews;
+import android.widget.Toast;
+
+import java.util.Calendar;
+import java.util.GregorianCalendar;
+
+import nodomain.freeyourgadget.gadgetbridge.activities.ConfigureAlarms;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBAlarm;
+import nodomain.freeyourgadget.gadgetbridge.model.ActivityUser;
+import nodomain.freeyourgadget.gadgetbridge.model.Alarm;
+
+/**
+ * Implementation of SleepAlarmWidget functionality. When pressing the widget, an alarm will be set
+ * to trigger after a predefined number of hours. A toast will confirm the user about this. The
+ * value is retrieved using ActivityUser.().getActivityUserSleepDuration().
+ */
+public class SleepAlarmWidget extends AppWidgetProvider {
+
+    /**
+     * This is our dedicated action to detect when the widget has been clicked.
+     */
+    public static final String ACTION =
+            "nodomain.freeyourgadget.gadgetbridge.SLEEP_ALARM_WIDGET_CLICK";
+
+    static void updateAppWidget(Context context, AppWidgetManager appWidgetManager,
+                                int appWidgetId) {
+
+        // Construct the RemoteViews object
+        RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.sleep_alarm_widget);
+
+        // Add our own click intent
+        Intent intent = new Intent(ACTION);
+        PendingIntent clickPI = PendingIntent.getBroadcast(
+                context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
+        views.setOnClickPendingIntent(R.id.sleepalarmwidget_text, clickPI);
+
+        // Instruct the widget manager to update the widget
+        appWidgetManager.updateAppWidget(appWidgetId, views);
+    }
+
+    @Override
+    public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
+        // There may be multiple widgets active, so update all of them
+        for (int appWidgetId : appWidgetIds) {
+            updateAppWidget(context, appWidgetManager, appWidgetId);
+        }
+    }
+
+    @Override
+    public void onEnabled(Context context) {
+        // Enter relevant functionality for when the first widget is created
+    }
+
+    @Override
+    public void onDisabled(Context context) {
+        // Enter relevant functionality for when the last widget is disabled
+    }
+
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        super.onReceive(context, intent);
+        if (ACTION.equals(intent.getAction())) {
+            int userSleepDuration = new ActivityUser().getActivityUserSleepDuration();
+            // current timestamp
+            GregorianCalendar calendar = new GregorianCalendar();
+            // add preferred sleep duration
+            calendar.add(Calendar.HOUR_OF_DAY, userSleepDuration);
+
+            int hours = calendar.get(calendar.HOUR_OF_DAY);
+            int minutes = calendar.get(calendar.MINUTE);
+
+            // overwrite the first alarm and activate it
+            GBAlarm alarm = new GBAlarm(0, true, true, Alarm.ALARM_ONCE, hours, minutes);
+            alarm.store();
+
+            setAlarmViaAlarmManager(context, calendar.getTimeInMillis());
+
+            Toast.makeText(context,
+                    String.format(context.getString(R.string.appwidget_alarms_set), hours, minutes),
+                    Toast.LENGTH_SHORT).show();
+        }
+    }
+
+    /**
+     * Use the Android alarm manager to create the alarm icon in the status bar.
+     *
+     * @param packageContext {@code Context}: A Context of the application package implementing this
+     *                                      class.
+     * @param triggerTime {@code long}: time at which the underlying alarm is triggered in wall time
+     *                    milliseconds since the epoch
+     */
+    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
+    private void setAlarmViaAlarmManager(Context packageContext, long triggerTime) {
+        AlarmManager am = (AlarmManager) packageContext.getSystemService(Context.ALARM_SERVICE);
+        // TODO: launch the alarm configuration activity when clicking the alarm in the status bar
+        Intent intent = new Intent(packageContext, ConfigureAlarms.class);
+        PendingIntent pi = PendingIntent.getBroadcast(packageContext, 0, intent,
+                PendingIntent.FLAG_CANCEL_CURRENT);
+        am.setAlarmClock(new AlarmManager.AlarmClockInfo(triggerTime, pi), pi);
+    }
+}
+
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/SettingsActivity.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/SettingsActivity.java
index acf84304..596a5141 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/SettingsActivity.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/SettingsActivity.java
@@ -15,6 +15,7 @@ import nodomain.freeyourgadget.gadgetbridge.devices.miband.MiBandPreferencesActi
 
 import static nodomain.freeyourgadget.gadgetbridge.model.ActivityUser.PREF_USER_GENDER;
 import static nodomain.freeyourgadget.gadgetbridge.model.ActivityUser.PREF_USER_HEIGHT_CM;
+import static nodomain.freeyourgadget.gadgetbridge.model.ActivityUser.PREF_USER_SLEEP_DURATION;
 import static nodomain.freeyourgadget.gadgetbridge.model.ActivityUser.PREF_USER_WEIGHT_KG;
 import static nodomain.freeyourgadget.gadgetbridge.model.ActivityUser.PREF_USER_YEAR_OF_BIRTH;
 
@@ -137,6 +138,7 @@ public class SettingsActivity extends AbstractSettingsActivity {
                 PREF_USER_GENDER,
                 PREF_USER_HEIGHT_CM,
                 PREF_USER_WEIGHT_KG,
+                PREF_USER_SLEEP_DURATION,
         };
     }
 
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/charts/AbstractChartFragment.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/charts/AbstractChartFragment.java
index 886aa25e..6ba3941f 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/charts/AbstractChartFragment.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/charts/AbstractChartFragment.java
@@ -12,7 +12,6 @@ import android.view.View;
 
 import com.github.mikephil.charting.charts.BarLineChartBase;
 import com.github.mikephil.charting.charts.Chart;
-import com.github.mikephil.charting.charts.CombinedChart;
 import com.github.mikephil.charting.components.YAxis;
 import com.github.mikephil.charting.data.BarData;
 import com.github.mikephil.charting.data.BarDataSet;
@@ -29,7 +28,6 @@ import java.text.SimpleDateFormat;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Calendar;
-import java.util.Collections;
 import java.util.Date;
 import java.util.GregorianCalendar;
 import java.util.HashSet;
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/charts/SleepChartFragment.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/charts/SleepChartFragment.java
index 17411ff6..6b9a7561 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/charts/SleepChartFragment.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/charts/SleepChartFragment.java
@@ -8,7 +8,6 @@ import android.view.View;
 import android.view.ViewGroup;
 
 import com.github.mikephil.charting.animation.Easing;
-import com.github.mikephil.charting.charts.BarLineChartBase;
 import com.github.mikephil.charting.charts.Chart;
 import com.github.mikephil.charting.charts.CombinedChart;
 import com.github.mikephil.charting.charts.PieChart;
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 c3c565f7..927a499b 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
@@ -6,7 +6,6 @@ import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 
-import com.github.mikephil.charting.charts.BarLineChartBase;
 import com.github.mikephil.charting.charts.Chart;
 import com.github.mikephil.charting.charts.CombinedChart;
 import com.github.mikephil.charting.charts.PieChart;
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/database/ActivityDatabaseHandler.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/database/ActivityDatabaseHandler.java
index 2df3759d..c94327a7 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/database/ActivityDatabaseHandler.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/database/ActivityDatabaseHandler.java
@@ -22,12 +22,12 @@ import nodomain.freeyourgadget.gadgetbridge.model.ActivitySample;
 import nodomain.freeyourgadget.gadgetbridge.util.GB;
 
 import static nodomain.freeyourgadget.gadgetbridge.database.DBConstants.DATABASE_NAME;
+import static nodomain.freeyourgadget.gadgetbridge.database.DBConstants.KEY_CUSTOM_SHORT;
 import static nodomain.freeyourgadget.gadgetbridge.database.DBConstants.KEY_INTENSITY;
 import static nodomain.freeyourgadget.gadgetbridge.database.DBConstants.KEY_PROVIDER;
 import static nodomain.freeyourgadget.gadgetbridge.database.DBConstants.KEY_STEPS;
 import static nodomain.freeyourgadget.gadgetbridge.database.DBConstants.KEY_TIMESTAMP;
 import static nodomain.freeyourgadget.gadgetbridge.database.DBConstants.KEY_TYPE;
-import static nodomain.freeyourgadget.gadgetbridge.database.DBConstants.KEY_CUSTOM_SHORT;
 import static nodomain.freeyourgadget.gadgetbridge.database.DBConstants.TABLE_GBACTIVITYSAMPLES;
 
 public class    ActivityDatabaseHandler extends SQLiteOpenHelper implements DBHandler {
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/database/schema/ActivityDBUpdate_6.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/database/schema/ActivityDBUpdate_6.java
index c805e352..483f556d 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/database/schema/ActivityDBUpdate_6.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/database/schema/ActivityDBUpdate_6.java
@@ -2,15 +2,10 @@ package nodomain.freeyourgadget.gadgetbridge.database.schema;
 
 import android.database.sqlite.SQLiteDatabase;
 
-import nodomain.freeyourgadget.gadgetbridge.database.DBHelper;
 import nodomain.freeyourgadget.gadgetbridge.database.DBUpdateScript;
 
 import static nodomain.freeyourgadget.gadgetbridge.database.DBConstants.KEY_CUSTOM_SHORT;
-import static nodomain.freeyourgadget.gadgetbridge.database.DBConstants.KEY_PROVIDER;
-import static nodomain.freeyourgadget.gadgetbridge.database.DBConstants.KEY_STEPS;
-import static nodomain.freeyourgadget.gadgetbridge.database.DBConstants.KEY_TIMESTAMP;
 import static nodomain.freeyourgadget.gadgetbridge.database.DBConstants.TABLE_GBACTIVITYSAMPLES;
-import static nodomain.freeyourgadget.gadgetbridge.database.DBConstants.TABLE_STEPS_PER_DAY;
 
 /**
  * Adds a column "customShort" to the table "GBActivitySamples"
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/miband/UserInfo.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/miband/UserInfo.java
index 9aa098bc..5fa4be90 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/miband/UserInfo.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/miband/UserInfo.java
@@ -1,11 +1,11 @@
 package nodomain.freeyourgadget.gadgetbridge.devices.miband;
 
+import java.util.Arrays;
+
 import nodomain.freeyourgadget.gadgetbridge.model.ActivityUser;
 import nodomain.freeyourgadget.gadgetbridge.service.devices.miband.DeviceInfo;
 import nodomain.freeyourgadget.gadgetbridge.util.CheckSums;
 
-import java.util.Arrays;
-
 public class UserInfo {
 
     private final String btAddress;
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/externalevents/SMSReceiver.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/externalevents/SMSReceiver.java
index 664e44e9..a2dd09a3 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/externalevents/SMSReceiver.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/externalevents/SMSReceiver.java
@@ -9,8 +9,6 @@ import android.os.PowerManager;
 import android.preference.PreferenceManager;
 import android.telephony.SmsMessage;
 
-import java.util.ArrayList;
-
 import nodomain.freeyourgadget.gadgetbridge.GBApplication;
 import nodomain.freeyourgadget.gadgetbridge.model.NotificationSpec;
 import nodomain.freeyourgadget.gadgetbridge.model.NotificationType;
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/model/ActivityUser.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/model/ActivityUser.java
index f2c87c49..3c58fc3a 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/model/ActivityUser.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/model/ActivityUser.java
@@ -16,17 +16,20 @@ public class ActivityUser {
     private Integer activityUserYearOfBirth;
     private Integer activityUserHeightCm;
     private Integer activityUserWeightKg;
+    private Integer activityUserSleepDuration;
 
     public static final int defaultUserGender = 0;
     public static final int defaultUserYearOfBirth = 0;
     public static final int defaultUserAge = 0;
     public static final int defaultUserHeightCm = 175;
     public static final int defaultUserWeightKg = 70;
+    public static final int defaultUserSleepDuration = 7;
 
     public static final String PREF_USER_YEAR_OF_BIRTH = "activity_user_year_of_birth";
     public static final String PREF_USER_GENDER = "activity_user_gender";
     public static final String PREF_USER_HEIGHT_CM = "activity_user_height_cm";
     public static final String PREF_USER_WEIGHT_KG = "activity_user_weight_kg";
+    public static final String PREF_USER_SLEEP_DURATION = "activity_user_sleep_duration";
 
     public int getActivityUserWeightKg() {
         if(activityUserWeightKg == null) {
@@ -56,6 +59,20 @@ public class ActivityUser {
         return activityUserHeightCm;
     }
 
+    /**
+     * @return the user defined sleep duration or the default value when none is set or the stored
+     * value is out of any logical bounds.
+     */
+    public int getActivityUserSleepDuration() {
+        if(activityUserSleepDuration == null) {
+            fetchPreferences();
+        }
+        if (activityUserSleepDuration < 1 || activityUserSleepDuration > 24) {
+            activityUserSleepDuration = defaultUserSleepDuration;
+        }
+        return activityUserSleepDuration;
+    }
+
     public int getActivityUserAge() {
         int userYear = getActivityUserYearOfBirth();
         int age = 25;
@@ -74,5 +91,6 @@ public class ActivityUser {
         activityUserHeightCm = Integer.parseInt(prefs.getString(PREF_USER_HEIGHT_CM, Integer.toString(defaultUserHeightCm)));
         activityUserWeightKg = Integer.parseInt(prefs.getString(PREF_USER_WEIGHT_KG, Integer.toString(defaultUserWeightKg)));
         activityUserYearOfBirth = Integer.parseInt(prefs.getString(PREF_USER_YEAR_OF_BIRTH, Integer.toString(defaultUserYearOfBirth)));
+        activityUserSleepDuration = Integer.parseInt(prefs.getString(PREF_USER_SLEEP_DURATION, Integer.toString(defaultUserSleepDuration)));
     }
 }
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/DeviceSupportFactory.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/DeviceSupportFactory.java
index 55765588..6bc07789 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/DeviceSupportFactory.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/DeviceSupportFactory.java
@@ -1,7 +1,6 @@
 package nodomain.freeyourgadget.gadgetbridge.service;
 
 import android.bluetooth.BluetoothAdapter;
-import android.bluetooth.BluetoothDevice;
 import android.content.Context;
 import android.widget.Toast;
 
@@ -11,10 +10,8 @@ import java.util.EnumSet;
 import nodomain.freeyourgadget.gadgetbridge.GBException;
 import nodomain.freeyourgadget.gadgetbridge.R;
 import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
-import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
 import nodomain.freeyourgadget.gadgetbridge.service.devices.miband.MiBandSupport;
 import nodomain.freeyourgadget.gadgetbridge.service.devices.pebble.PebbleSupport;
-import nodomain.freeyourgadget.gadgetbridge.util.DeviceHelper;
 import nodomain.freeyourgadget.gadgetbridge.util.GB;
 
 public class DeviceSupportFactory {
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/pebble/DatalogSessionHealthSleep.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/pebble/DatalogSessionHealthSleep.java
index a2ec192a..8528287f 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/pebble/DatalogSessionHealthSleep.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/pebble/DatalogSessionHealthSleep.java
@@ -1,6 +1,5 @@
 package nodomain.freeyourgadget.gadgetbridge.service.devices.pebble;
 
-import android.database.sqlite.SQLiteDatabase;
 import android.widget.Toast;
 
 import org.slf4j.Logger;
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/pebble/DatalogSessionHealthSteps.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/pebble/DatalogSessionHealthSteps.java
index 6ce8bd09..5c68b15d 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/pebble/DatalogSessionHealthSteps.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/pebble/DatalogSessionHealthSteps.java
@@ -1,8 +1,6 @@
 package nodomain.freeyourgadget.gadgetbridge.service.devices.pebble;
 
 
-import android.database.sqlite.SQLiteDatabase;
-
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/util/DeviceHelper.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/util/DeviceHelper.java
index ae7ee58e..b3aad4b7 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/util/DeviceHelper.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/util/DeviceHelper.java
@@ -8,7 +8,6 @@ import android.preference.PreferenceManager;
 import android.widget.Toast;
 
 import java.util.ArrayList;
-import java.util.HashSet;
 import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Set;
diff --git a/app/src/main/res/layout/sleep_alarm_widget.xml b/app/src/main/res/layout/sleep_alarm_widget.xml
new file mode 100644
index 00000000..b1b9c8c9
--- /dev/null
+++ b/app/src/main/res/layout/sleep_alarm_widget.xml
@@ -0,0 +1,18 @@
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@color/primary_light"
+    android:padding="@dimen/widget_margin">
+
+    <TextView
+        android:id="@+id/sleepalarmwidget_text"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:contentDescription="@string/appwidget_text"
+        android:text="@string/appwidget_text"
+        android:textColor="#ffffff"
+        android:textSize="24sp"
+        android:gravity="center_vertical|center_horizontal"
+        android:textStyle="bold|italic" />
+
+</RelativeLayout>
\ No newline at end of file
diff --git a/app/src/main/res/values-de/strings.xml b/app/src/main/res/values-de/strings.xml
index 8426034e..757aa96c 100644
--- a/app/src/main/res/values-de/strings.xml
+++ b/app/src/main/res/values-de/strings.xml
@@ -200,4 +200,6 @@
   <string name="fwinstaller_firmware_not_compatible_to_device">Diese Firmware ist nicht mit dem Gerät kompatibel</string>
   <string name="waiting_for_reconnect">warte auf eingehende Verbindung</string>
   <string name="appmananger_app_reinstall">Erneut installieren</string>
+  <string name="add_widget">Widget hinzufügen</string>
+  <string name="activity_prefs_sleep_duration">Bevorzugte Schlafdauer in Stunden</string>
 </resources>
diff --git a/app/src/main/res/values-v14/dimens.xml b/app/src/main/res/values-v14/dimens.xml
new file mode 100644
index 00000000..4db8c590
--- /dev/null
+++ b/app/src/main/res/values-v14/dimens.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <!--
+Refer to App Widget Documentation for margin information
+http://developer.android.com/guide/topics/appwidgets/index.html#CreatingLayout
+    -->
+    <dimen name="widget_margin">0dp</dimen>
+
+</resources>
\ No newline at end of file
diff --git a/app/src/main/res/values/dimens.xml b/app/src/main/res/values/dimens.xml
index 47c82246..fb6e2350 100644
--- a/app/src/main/res/values/dimens.xml
+++ b/app/src/main/res/values/dimens.xml
@@ -2,4 +2,10 @@
     <!-- Default screen margins, per the Android Design guidelines. -->
     <dimen name="activity_horizontal_margin">16dp</dimen>
     <dimen name="activity_vertical_margin">16dp</dimen>
+
+    <!--
+Refer to App Widget Documentation for margin information
+http://developer.android.com/guide/topics/appwidgets/index.html#CreatingLayout
+    -->
+    <dimen name="widget_margin">8dp</dimen>
 </resources>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 14951692..eba0070c 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -225,4 +225,9 @@
     <string name="authenticating">authenticating</string>
     <string name="authentication_required">authentication required</string>
 
+    <string name="appwidget_text">Zzz</string>
+    <string name="add_widget">Add widget</string>
+    <string name="activity_prefs_sleep_duration">Preferred sleep duration in hours</string>
+    <string name="appwidget_alarms_set">An alarm was set for %1$d:%2$d</string>
+
 </resources>
diff --git a/app/src/main/res/xml/preferences.xml b/app/src/main/res/xml/preferences.xml
index cb2a8a6f..60eb7c5f 100644
--- a/app/src/main/res/xml/preferences.xml
+++ b/app/src/main/res/xml/preferences.xml
@@ -153,6 +153,12 @@
             android:key="activity_user_weight_kg"
             android:maxLength="3"
             android:title="@string/activity_prefs_weight_kg" />
+
+        <EditTextPreference
+            android:inputType="number"
+            android:key="activity_user_sleep_duration"
+            android:maxLength="2"
+            android:title="@string/activity_prefs_sleep_duration" />
     </PreferenceScreen>
 
     <PreferenceCategory
diff --git a/app/src/main/res/xml/sleep_alarm_widget_info.xml b/app/src/main/res/xml/sleep_alarm_widget_info.xml
new file mode 100644
index 00000000..c65c4ca3
--- /dev/null
+++ b/app/src/main/res/xml/sleep_alarm_widget_info.xml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
+    android:initialKeyguardLayout="@layout/sleep_alarm_widget"
+    android:initialLayout="@layout/sleep_alarm_widget"
+    android:minHeight="40dp"
+    android:minWidth="40dp"
+    android:previewImage="@drawable/ic_launcher"
+    android:updatePeriodMillis="86400000"
+    android:widgetCategory="home_screen"></appwidget-provider>
\ No newline at end of file
diff --git a/app/src/test/java/nodomain/freeyourgadget/gadgetbridge/service/TestDeviceSupport.java b/app/src/test/java/nodomain/freeyourgadget/gadgetbridge/service/TestDeviceSupport.java
index a3a8ff1f..82932e23 100644
--- a/app/src/test/java/nodomain/freeyourgadget/gadgetbridge/service/TestDeviceSupport.java
+++ b/app/src/test/java/nodomain/freeyourgadget/gadgetbridge/service/TestDeviceSupport.java
@@ -10,7 +10,6 @@ import java.util.UUID;
 
 import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
 import nodomain.freeyourgadget.gadgetbridge.model.Alarm;
-import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
 import nodomain.freeyourgadget.gadgetbridge.model.NotificationSpec;
 import nodomain.freeyourgadget.gadgetbridge.model.ServiceCommand;