Choral Public Domain Library

‘Music Theory - Chords in Keys’. This simple music theory app helps aspiring musicians to learn what all the major, minor and diminished chords are in all 12 major keys.

This music theory app is available now for Android on Google Play: https://play.google.com/store/apps/deta ... ordsInKeys

Looks nifty. Another group of musicians that might be interested are guitarists, in case you aren't already getting the word out to that community.

Stuart Bahn wrote:‘to learn what all the major, minor and diminished chords are in all 12 major keys.

One learns some more theory every day. I was under the misapprehension that there were 17 major keys.

There is now a minor key version based on the natural minor scale: https://play.google.com/store/apps/deta ... Keys&hl=en

Another quick update. Version 2 of ‘Music Theory - Chords in Keys’ is now available for iOS and Android. This new version teaches and tests users to identify all the essential three and four-note chords and arpeggios within the 12 major, natural minor, harmonic minor and melodic minor scales.

iTunes: http://goo.gl/LJCiuR
Google Play: http://goo.gl/zo1YQR
Amazon: http://goo.gl/L62nyR
Demonstration video: http://goo.gl/PP99je

Version 3 of 'Music Theory - Chords in Keys' for Android now has audio and test notes within chords as well as chords within keys: https://play.google.com/store/apps/deta ... ordsInKeys

Version 3 for iOS is due to be released in the next few weeks.