Chordical

Chordical is a flashcard-style tool for helping musicians practice and memorize their chords. You can select individual chords and chord qualities you'd like to practice or you can even try the new diatonic chord mode that cycles between random chords in the keys you've selected. Chordical also supports MIDI input, so you can use any MIDI instrument to practice (as long as it supports playing a chord!). The app also supports MIDI clock input so you can sync a backing track from a DAW with the app while you practice so things are a bit more fun. :)