DOWNLOAD FOR FREE TODAY! Introducing a secret ninja prank you can play on your friends with your iPhone or iPod! Now you can recreate this special trick. Set a countdown, up to 60 minutes before the prank and then, press the button to start the prank and watch as the screen fades to an innocent off mode silently awaiting your prank victims. To change a setting or turn the prank off, just tap anywhere on the screen to have the settings fade back into view.