The chord wheel concept is an invaluable reference for composing. The app currently does everything the paper version will do for half the cost.
Unfortunately, the extra sound function, which would be really cool, only works if you just barely touch the screen. I mean like barely touch it, almost so that you dont feel the screen. If you tap as you would the keyboard on your phone it will never play. This makes it impractical to use so it may just as well not work as other users have said.
It would be an awesome feature to be able to find the key and chords for a song idea just by tapping your phone. Like have a piano or acoustic guitar in your pocket. Please fix the sound guys, if the sound worked right, id pay double.
davidmccully about The Chord Wheel, v1.1