This is the best Desk Clock app available in the market
Simple steps to use the app
1. Open the app
2. Set the alarm if you needed.
3. Connect the charger to the device if planning to leave the app on for long time.
4. Let the device lie by your bed side.
The image with dark background is desk clock screen saver mode. This gets activated after a few minutes.
Screensaver mode is very important for OLED display phones like the S2, S3. These displays get burnt out quickly if screen saver mode isn't there in deskclock app.
*********Lastly...please rate the app and provide comments*********
Now you don't need to be connected to the charger.