Music Genius - Trivia on Rock, Pop, Country and More at Mac App Store analyse

This music trivia application gives you a random set of 15 questions per category, which include years (1950s - 2010s), type of music (American Rock, Country, Pop, etc.), and specific groups (Beatles, Eagles, etc.). You can optionally store your information in order to compare your scores to others around the world. There are well over four thousand questions, so keep trying over and over. You are allowed 30 seconds per question.