Open the app - Start charging (or use the Motion Sensor function) - Lock your phone (optional) - Done!
To stop alarm - Open your phone - Double click on Home Button - or swipe up from the bottom of the screen and pause slightly in the middle of the screen.
Then swipe up on the app's preview to close the app.
That simple!
The new Motion Sensor has an about 5 second delay so you have time to put it away. The sensor is very sensitive.
Perfect to use at the airport, your office, library, or in any place where you will leave your device unattended for a short while.
You can also use the app as an alarm for power surge/failure when your battery is really low and you depend on your wake-up call. Works even better with the new Volume control.
Also works if your power pack loses all the power.
(When using for example an Apple Smart Power Case, you have to use the Motion Function as an alarm since the normal function senses power loss.)