QuizUp is a discontinued mobile game originally developed and published by Iceland-based Plain Vanilla Games and later operated by Glu Mobile. The game was a mobile trivia app similar to the game Trivial Pursuit. QuizUp was a multiplayer game where one user competes against another in seven rounds of timed multiple-choice questions of various topics. There were over 1,200 total topics available to users to choose from, and all the questions were voluntarily submitted by content contributors. Most topics were available in several different languages.