Flexible chord and scale dictionary with user libraries, reverse mode and a progression builder.

Use PianoCompanion App
Piano Companion QR Code

Why Piano Companion

Piano Companion is a music theory app for songwriters, producers, teachers, and students. It’s a flexible piano chord and scale dictionary with user libraries, reverse mode, circle of fifths, and a chord progression builder with common patterns. If you can’t remember the name of a piano chord or scale, this app will help you to find it by key or using your external MIDI keyboard. For example, just press C and G, and you will get C Major as the first piano chord in the search result. If you don’t see a piano chord or a specific scale, you can create a custom piano chord or scale and use it for chord charts or your user library.

Piano Companion shows chord and scale notes on the grand staff, degrees, relative scales, intervals, and fingering for both hands in major and minor scales. Plus, you can contribute your own custom fingering. You can practice scales in different keys and clefs and practice progressions. You can also listen to how a scale or chord sounds in the loop or arpeggiated. Additionally, you can see a list of compatible chords for the selected scale or a list of compatible scales for a selected chord.

Piano Companion helps you compose, practice progressions, and experiment with different chord progressions using our Chord Progression Builder with relative or common chords.

  • Dictionary

    Search over 1,500 piano chords and 10,000 scales.


  • Progressions

    Experiment with chord progressions by using our progression builder. Patterns will suggest possible chords.

  • Reverse Mode

    Find all possible scales or chords by tapping several keys.


  • Circle of Fifths

    Use the interactive circle of fifths to navigate through scale chords.


  • Localized

    Piano Companion supports many popular key notations and localized for a wide range of languages.

  • Everywhere

    Piano Companion is everywhere: macOS/iPhone/iPod/iPad, Android, Amazon Store, Windows Phone 8+, Windows 8.1+

Piano Companion is Everywhere!

Piano Companion QR Code