Demon Cam is our first pick and this digital makeup app help you scare your friends half to death with its short videos. All you have to do is record your face, doing something mundane. The app then track your eyes and mouth perfectly morph you into a devilish demon. And bwahhhhh – without warning it gives out a loud cry to create the perfect jump scare. Yes it only for iOS, but Android users can try HauntedBooth or ZombieBooth for similar effect.