If you love answering trivia questions and the potential of winning money you should probably be playing HQ Trivia.
Over the holiday is when I first heard about this game and I've been playing it ever since.
HQ Trivia is hosted by Scott Rogowsky and he might possibly be the most annoying person in the world, but what are you going to do. The comments section of the game is usually filled with people asking him to be quiet.
Personally I think Scott is doing it on purpose. Can't hate his game.
They send you a notification when the game is going live and you play for actual money. If you can answer all 12 questions (something I have not done) you win part of the money along with all the other winners.
It is totally addictive, I'm just warning you now.
Download it here for iPhones: https://itunes.apple.com/us/app/hq-live-trivia-game-show/id1232278996?mt=8