4/5 rating based on 2 reviews. Read all reviews for Tones for iPhone.
Tones is free iOS app published by Ben Walker
TheOddLinguist
This app is so much fun to play with. The samples are high-quality, and the interface couldn't be simpler. Some more sounds and additional options (like recording, mixing, alternate scales, etc) would be great...but that may not be the focus. It's just so much fun.