Alarm Screen Unlock Joke

A free app alarm to discover the curious who is snooping on your mobile.
The application works as follows: open the app and then turn off your phone's screen when someone is tinkering on your mobile will come across a finger digital scanner, then the person will press your finger on the scanner to unlock the screen and will sound a strong alarm surprise.
Recalling that the app works with a false screen available for android and is a "joke".