A host writes the quiz in the builder: questions and answers, a picture or video where it helps, and a time limit for each round.
Starting a game produces a PIN. Players open redmo.xyz, enter the PIN and a name, and they are in - no account, no app, no download.
The host controls the pace from a bigger screen. Each question is shown to the room, phones answer, and the scoreboard follows.
RedMo - a free live quiz platform by Alan Stasik.