HarmoniKeys: Piano Chords

HarmoniKeys helps pianists and musicians find the smoothest way to move from one chord to the next. The algorithm automatically computes the optimal voice leading, so your fingers travel the shortest distance and every transition feels natural.

Why HarmoniKeys:

🎹 Optimal voice leading
The algorithm finds the best position for every chord change, with minimal finger movement and natural-sounding transitions.

🎼 Complete chord library
19 chord types: major, minor, 7th, 6th, add, sus, diminished and augmented.

🖐 Left hand or right hand
The right fingering for each hand, from triads to four-note chords.

🔄 Inversions and positions
Choose your starting position: root, first or second inversion.

⏱ Playback with metronome
Hear your progressions at your own tempo (40-200 BPM), with metronome and loop mode.

🎵 Ready-to-play progressions
Canon, Blues, Jazz, Pop... load a classic progression in one tap and start playing.

🔗 Save and share
Save your own progressions and share them with your students or fellow musicians via a QR code.

📚 English notation or solfège
Show notes as C-D-E or Do-Re-Mi, whichever you prefer.

📶 100% offline
No account, no connection. The app works anywhere, anytime.

💳 One-time purchase
Pay once. No subscription, no hidden in-app purchases.

Perfect for piano students, teachers, songwriters and arrangers.