This app was mentioned in 2 comments, with an average of 1.00 upvote
this is pretty much exactly what you're looking for!
https://play.google.com/store/apps/details?id=com.Cube8.GameBuzzerA
Available on iOS as well
This is only for 2 people but check this out.
https://play.google.com/store/apps/details?id=com.Cube8.GameBuzzerA