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NOT RECOMMENDED FOR APPS FROM META, UBER, WHATSAPP, ANY GOOGLE APP REQUIRING AN ACCOUNT, OR ANY BANKING APP. RISK OF ACCOUNT BAN WITH CHANGED SIGNATURE.
For these apps, use Install to Device via USB or download as ZIP (uncheck merge) to preserve original signatures.
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Find any piano chord or scale in seconds — even when you don't know its name. Piano Companion is the music theory app trusted by over 1,000,000 musicians worldwide, rated 4.75★ from 22,000+ reviews.
Forget what a chord is called? Press a few keys on the on-screen piano or your MIDI keyboard and the app identifies it instantly. Looking for a scale that fits a song you're writing? The interactive Circle of Fifths shows every compatible chord at a glance.
What you can do with Piano Companion
- Look up 1500+ piano chords up to the 6th inversion — major, minor, diminished, augmented, sevenths, and beyond.
- Browse 10,000+ scales — major, minor, chromatic, pentatonic, blues, modes, and more.
- Build harmonies in the Chord Progression Builder using relative or common chords.
- Hear how a chord