Impress your friends with some smartphone magic. Harnessing the power of your proximity sensor, you can wave a hand over your phone to do things like launch an application, expand the notification bar, turn off the display, or make the device play a sound. Short on usefulness, long on fun.
WIRED Can assign actions based on which way your phone is tilted. Confirms commands with a vibration.
TIRED Some proximity sensors work better than others (if you have one at all). Limited set of actions.