diff --git a/app/src/main/java/info/nightscout/androidaps/MainApp.java b/app/src/main/java/info/nightscout/androidaps/MainApp.java
index a1300f59bc..97c5d49c0c 100644
--- a/app/src/main/java/info/nightscout/androidaps/MainApp.java
+++ b/app/src/main/java/info/nightscout/androidaps/MainApp.java
@@ -51,6 +51,7 @@ import info.nightscout.androidaps.plugins.general.overview.OverviewPlugin;
 import info.nightscout.androidaps.plugins.general.persistentNotification.PersistentNotificationPlugin;
 import info.nightscout.androidaps.plugins.general.signatureVerifier.SignatureVerifier;
 import info.nightscout.androidaps.plugins.general.smsCommunicator.SmsCommunicatorPlugin;
+import info.nightscout.androidaps.plugins.general.timeSpent.TS;
 import info.nightscout.androidaps.plugins.general.versionChecker.VersionCheckerPlugin;
 import info.nightscout.androidaps.plugins.general.wear.WearPlugin;
 import info.nightscout.androidaps.plugins.general.xdripStatusline.StatuslinePlugin;
@@ -138,6 +139,8 @@ public class MainApp extends Application {
             log.error("Error with Fabric init! " + e);
         }
 
+        registerActivityLifecycleCallbacks(TS.INSTANCE);
+
         mFirebaseAnalytics = FirebaseAnalytics.getInstance(this);
         mFirebaseAnalytics.setAnalyticsCollectionEnabled(!Boolean.getBoolean("disableFirebase"));
 
@@ -438,7 +441,7 @@ public class MainApp extends Application {
         if (timeDateOrTZChangeReceiver != null) {
             unregisterReceiver(timeDateOrTZChangeReceiver);
         }
-
+        unregisterActivityLifecycleCallbacks(TS.INSTANCE);
     }
 
     public static int dpToPx(int dp) {
diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/general/timeSpent/TS.kt b/app/src/main/java/info/nightscout/androidaps/plugins/general/timeSpent/TS.kt
new file mode 100644
index 0000000000..e00a8a1599
--- /dev/null
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/general/timeSpent/TS.kt
@@ -0,0 +1,38 @@
+package info.nightscout.androidaps.plugins.general.timeSpent
+
+import android.app.Activity
+import android.app.Application
+import android.os.Bundle
+import info.nightscout.androidaps.logging.L
+import org.slf4j.LoggerFactory
+
+object TS : Application.ActivityLifecycleCallbacks {
+    private val log = LoggerFactory.getLogger(L.CORE)
+    override fun onActivityPaused(activity: Activity?) {
+        log.debug("onActivityPaused " + activity?.localClassName)
+    }
+
+    override fun onActivityResumed(activity: Activity?) {
+        log.debug("onActivityResumed " + activity?.localClassName)
+    }
+
+    override fun onActivityStarted(activity: Activity?) {
+        log.debug("onActivityStarted " + activity?.localClassName)
+    }
+
+    override fun onActivityDestroyed(activity: Activity?) {
+        log.debug("onActivityDestroyed " + activity?.localClassName)
+    }
+
+    override fun onActivitySaveInstanceState(activity: Activity?, outState: Bundle?) {
+        log.debug("onActivitySaveInstanceState " + activity?.localClassName)
+    }
+
+    override fun onActivityStopped(activity: Activity?) {
+        log.debug("onActivityStopped " + activity?.localClassName)
+    }
+
+    override fun onActivityCreated(activity: Activity?, savedInstanceState: Bundle?) {
+        log.debug("onActivityCreated " + activity?.localClassName)
+    }
+}
\ No newline at end of file