Chordology

See music.
Hear music.
Understand it.

Chords and scales, beautifully visualized. Every note has a colour, every chord plays back — on piano, guitar, bass, banjo and ukulele.

Download on theApp Store Free on iPhone & iPad
Piano Guitar Bass Banjo Ukulele
Chordology showing a C major chord on the guitar fretboard, each note colour-coded
The colour system

A colour for every note.

Twelve pitch classes, twelve hues. A note looks the same whether you’re reading a fretboard, a keyboard or a tab — so shapes and patterns finally click.

Learn the colours once, and every instrument reads the same.

Every way to look

One chord. Every view.

See the same chord as a fretboard, a keyboard, a chord diagram or tab — switch instrument and view in a tap, and the colours carry across.

C major on guitar fretboard
Fretboard
The whole neck, lit up
C major on a colour-coded piano keyboard
Keyboard
Keys in their colours
E flat minor chord diagram
Chord diagram
Every voicing, paged
G minor shown as tablature
Tablature
Fret numbers, read fast
More than a reference

Play it. Learn it. Tune it.

Hear every chord

Tap play and listen back. Roll it as a strum, hit it as a block, or walk it as an arpeggio.

StrumBlockArpeggio

Scales & real theory

Major, minor, modes and more — with degree numbering and the interval pattern spelled out for every scale.

W·W·H·W·W·W·H

Tunings & capo

Standard, drop, open and alternate tunings on every instrument — place a capo on any fret and everything updates.

Drop DOpen GCapo

Start seeing music.

Free to download on iPhone and iPad. Every instrument, every view, a colour for every note.