This app makes a great lockout buzzer system for practice sessions of academic quiz bowls, including Quiz Bowl, Scholar Bowl, Bible Bowl and Bible Quiz. Use it for practice in place of bulky buzzer systems. It is also useful when traveling. Homeschool families will find it useful for judging "who's first" in friendly family competitions.
It has 4 "buzzers" in each corner of the screen. When a contestant taps a buzzer, a tone sounds, that buzzer lights up and all other buzzers are locked out. A timer light comes on and stays lit for a pre-determined amount of time, which is used to regulate how long the contestant has to answer (or begin answering) after they buzz in.