Use APKPure App
Get Buzzer old version APK for Android
This is a simple Buzzer app, you get the current time when you hit buzzer.
This could be used as Virtual buzzer for quiz shows. If Multiple teams hit buzzer on the same time, then the buzzer time feature of this app will help you find out who is the first one to hit buzzer.
There are different type of Buzzer Sounds to differentiate the teams