MusicLoverToThaMax

It's a good app and sounds good, but needs a lot of work. It's not even optimized for the iPhone 5. It gets really laggy and will freeze often and the sound just gets stuck on a certain note until you push a different note, and I'm using an iPhone 5 which has a faster processor than an iPhone 4S. Needs a lot of optimization. Sound is good though, when it works and helps you learn how to play an accordion.