This Android application is a toy, a game and a self defence trainer. Depends on how you would like to use it. Hold your Android phone or tablet and move it fast like you would to strike or punch someone. It will then make a punching slapping or kicking noise. It uses the devices accelerometer to detect motion. It will show the maximum acceleration your punch caused on the screen during a punch/strike session. It can therefore be used to record the power of your punch. Play with your friends to see who can strike the fastest. Or use it for combat ( self defence ) training. Or just swing it around for some fun. The motion sensing direction and sound trigger sensitivity can be adjusted. And you can select different sounds. You could tie the device around your wrist for ease of use. Play with this application and let your imagination go... Slap your boss, your mom or whoever angered you ;). ( just don't do that for real ). This game is good for stress relief.