In the last months my spare time has been mostly used to follow some Android apps development courses. In the middle of a mobile sensors chapter, I had the idea for this new app that can be used as a detector of whatever you want.
The proximity sensor and the accelerometer are used to give a positive or negative sign whenever you touch someone with the mobile. You can adjust the settings to define when will it give a positive or negative sign or you can put it in random mode and use the app to randomly select the person who will make some task or to select the team players in your soccer game. Test it, review it and have fun.
The app images were of course made in Blender :)