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diff --git a/Sensor Watch Starter Project/app.h b/Sensor Watch Starter Project/app.h
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+/**
+  * Header file for Sensor Watch application
+  * 
+  * Ideally you should implement your app entirely within these functions, as well as any
+  * interrupt callbacks you register with the watch API. The general flow is as follows:
+  * 
+  * 1. main.c configures the watch
+  * 2. main.c calls your app_init() function. 
+  *      - You may wish to enable some functionality and peripherals here.
+  *      - You should definitely set up some wake-up sources here.
+  * 3. main.c calls your app_loop() function. 
+  *      - Run code and update your UI here.
+  * 4. main.c calls your app_prepare_for_sleep() function.
+  *      - Consider resetting any state that was set in your wakeup callback here.
+  *      - You may also want to disable / depower external sensors or peripherals here.
+  * 5. main.c enters the STANDBY sleep mode.
+  *      - No user code will run, and the watch will enter a low power mode.
+  *      - The watch will remain in this state until something from (2) wakes it.
+  * 6. main.c calls your app_wake_from_sleep() function.
+  *      - You may wish to re-enable any peripherals you disabled.
+  *      - After this, execution resumes at step (3).
+  */
+
+#include "watch.h"
+
+void app_init();
+void app_loop();
+void app_prepare_for_sleep();
+void app_wake_from_sleep();