This was an Amazon App Store Giveaway
Tried Quizr, one of those trivia test apps where you get questions off the Internet and thus almost never the same questions twice. UI is pretty good, and performance is respectable. However, you need to register, and that's kinda pain.
http://www.appbrain.com/app/quisr-pro-%7C-1-4-player-quiz/com.viennaopenminds.quisr