Piano Companion is a music theory app which helps songwriters, producers, teachers and their students. It’s a flexible piano chords and scales dictionary with user libraries, reverse mode, the circle of 5ths, chord progression builder with common patterns. If you can’t remember the name of a piano chord or scale, this app helps you to find it by keys or using your external MIDI keyboard. For example, just press C, 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.

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

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

Key features:

- 1500+ piano chords, up to 6th inversions such as major, minor, diminished, augmented, sevenths, etc.
- 10,000+ scales, such as Ionian (major), Aeolian (minor), Dorian, Phrygian, Lydian, Mixolydian, Locrian, Harmonic minor, Melodic Minor, chromatic, pentatonic, blues, etc.
- Chord Progression builder with scale patterns (chord sequencer)
- Interactive Circle of Fifths with grand staff and relative scales
- Ability to input your own custom chords and organize your own chord charts and library
- External MIDI keyboard support for reverse mode
- MIDI output with the ability to connect your favorite DAW (Ableton, Garage Band, etc.) with Piano Companion
- List of available chords in Circle of Fifths, practice common chords.
- Popular key notations: English, Italian, German, Japanese, Russian, etc.
- Shows chord and scale in different octaves on the grand staff with treble and bass clef
- Analytical labels: Secondary Dominant and Secondary Leading-Tone
- Common degrees: Tonic, Supertonic, Mediant, Subdominant, Dominant, Submediant, Leading tone (in Major