iScrob - http://iscrob.com http://iscrob.com - a Last.fm scrobbler for iOS. It's free with ads, or $5 with no ads. I released it almost exactly 1 year ago, and

iScrob - http://iscrob.com http://iscrob.com - a Last.fm scrobbler for iOS. It's free with ads, or $5 with no ads. I released it almost exactly 1 year ago, and it's averaged about $20/day in revenue since then. It's unique because there's some trickery involved getting around the strict iOS backgrounding requirements, and most of my competitors haven't done a great job with it.