Are you feeling tired? Need a little pick me up? Do you want another caffeinated drink but are unsure if your caffeine levels will handle it? Well this app can't do any of those things but you can sure make your friends think it can! Prank Caffeine Scanner will scan your thumb and let you know your current caffeine level. This app is bound to be a hit around your office or even around the schoolyard!! You can even change the settings to have it talk to you!!!