Brainzzle
Challenge your friends to a game that consists in 3 rounds. Each round represent a random game out of 10 possible games. The winner will be the person which has the most points at the end of the final round.
Or you can play in a weekly tournament where you can earn a weekly reward based on what place you have finished.
https://itunes.apple.com/it/app/brainzzle-light/id1056633162?mt=8
https://play.google.com/store/apps/details?id=com.antonio.lightbrainzzle