KeyChord (Android) app for FREE
Keychord is the dynamic dictionary / reference app for piano chords and scales. Use it to find all the scales and chords. Included is the five-octave scrollable multi-touch mini-piano with 128 different sounds from Mini Piano Pro.
Tap an already selected rootnote for different kind of information modes like note-names or intervals. Everything is dynamic, we don't use a database to give you a few predefined chord locations, but we know how a chord works and let you select a chord everywhere you want. Audio playback is also enabled in all modes. Internet connection is only used for OPT-IN statistics.++