Kahoot is a multiple-choice fast-paced review game for students. Students must be able to see a main screen, and use their individual devices (or team devices) to answer questions. The faster the correct answer, the more the points.

Quizizz is a multiple-choice go-at-your-own-pace review game for students. Students use their own screen to see the questions and select from an answer. The scores are tallied and a winner is determined once everyone has completed the review.

Both Quizizz and Kahoot have free and paid features - but are customizable without paying for anything.