Chord & scale visualizer for guitar & piano · iOS · macOS
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.
What it does
Hear every chord
Tap play and listen back. Roll it as a strum, hit it as a block, or walk it as an arpeggio. Strum Block Arpeggio
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 tuning on every instrument, free. Chordology Pro adds drop, open and alternate tunings, and a capo on any fret — everything updates as you change it. Drop D Open G Capo
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.
- C
- C♯
- D
- D♯
- E
- F
- F♯
- G
- G♯
- A
- A♯
- B
Learn the colours once, and every instrument reads the same.
Questions
Which instruments does Chordology support?
Piano, guitar, bass, banjo and ukulele — all five free, each with standard tuning. Switch instrument in a tap and every chord and scale redraws instantly. Alternate tunings and capo positions are part of Chordology Pro.
Can I hear the chords and scales play back?
Yes. Tap play to hear any chord as a strum, a block or an arpeggio, and step through scales note by note — so you can check a voicing by ear as well as by eye.
How does the colour system work?
Each of the twelve notes has its own colour, and that colour stays the same across the fretboard, keyboard, chord diagrams and tab. Learn the colours once and every instrument reads the same, so shapes and patterns finally click.
Is Chordology free?
Yes. Every instrument, chord, scale and playback is free, with standard tuning throughout. Chordology Pro is a one-time purchase that adds alternate tunings, a capo on any fret, and sharing — no subscription, ever.
Also in the line
The other apps that go with it.
