ChordDetector finds the chords of the songs you are listening on iTunes or Spotify.
Searches ultimate-guitar and finds the best chord possible for you.
Fires a notification when a match found.
It sits on your Mac's status bar.
Stores up to 20 chords in its history.
Download for Mac
There are other great music theory apps available.
A music theory app that shows you lots of scales and chords with lots of features.
A music theory app for guitar, bass or any kind of instrument player with frets.
A powerful chord progression app with built-in MIDI sequencer.
MIDI Sequencer and Arpeggiator for iOS.
AUv3 MIDI Music Theory Keyboard for iOS.
AUv3 MIDI Sequencer for iOS.
AUv3 MIDI Rhythm Generator for iOS.
AUv3 MIDI Arpeggiator.
AUv3 MIDI Chord Sequencer.
Mac Status Bar App.