Sonachord

Learn piano chords across 28 chapters — ear training, MIDI, on-screen keyboard and local mic detection. No account, no subscription.

Sonachord is a piano learning app with a chord-focused approach.

Follow a guided path of 28 chapters — from your first notes and triads to extended chords, progressions, and ear training. You'll learn how chords look, sound, and work in real music.

In the app you can:

• Learn piano chords step by step
• Practice recognition, recall, and progressions
• Train your ear with focused exercises
• Play along with the on-screen keyboard, MIDI, or a real piano
• Use local acoustic detection through your microphone
• Practice offline, with no account required

Sonachord is a great fit for beginners, returning players, students, and teachers.

Privacy: No account required. Your progress stays on your device. The microphone is used only for local note detection — audio is never recorded, stored, or uploaded.

Payment: No subscription. Full access to all chapters and exercises unlocks with a one-time in-app purchase.