A lot or a little?
Parents need to know that Tetris is a puzzle game for iOS and Android devices. The latest app version of this popular puzzle game includes a single-player version and Tetris Royale, an option that allows you to see how your score stacks up against 100 other people's -- although players won't directly interact with those players. The app also features a free nightly Tetris Primetime match, which is narrated by a host and offers a chance to win cash prizes. Players will also periodically see ads when playing, unless they pay to remove them. Otherwise, there's no inappropriate content.