This app detects the chord that is played using the microphone. It displays the chord immediately after detecting on the main screen.
It is particularly useful when you want to know which chords are played in a song. Simply play the song (on Spotify, Youtube or so) and run this app on your phone. It will tell which chords are being played.
This app was created when a friend of mine who plays the guitar wanted to know the chord of a particular sound he found on his guitar.