Stop memorizing boxes.
See the whole neck, lit up.
Chordlight shows every scale and arpeggio across all 24 frets — or the entire piano keyboard — as one connected, color-coded map. Not five disconnected shapes. The whole instrument, glowing with the notes that matter.
Coming soon to the App Store for iPhone · iOS 26 · guitar & pianoSee the music
Every note wears its meaning
Gold is home — the root. Warm colors are major, cool colors are minor, silver marks perfect intervals, purple marks tension. Shapes carry the same information, so quality reads even without color. You're not memorizing patterns — you're learning what your instrument sounds like before you play it.
A companion for writing
It sits beside you while you compose
Explore chords with their tensions and altered notes, see which scales fit and which arpeggios substitute, audition real voicings with a tap — and loop progressions with voice-leading-optimized changes until the idea arrives.
Find what you hear in your head
Tap three or more notes on the fretboard or keyboard and Chordlight names the scales and chords they belong to. No microphone, no listening — just your fingers and the map.
Two instruments, one map
Guitar in 6 or 7 strings with alternate tunings — Drop D, DADGAD, Open G and more — and a full piano. Tap any note to hear it; scales, chords and progressions all play.
Built with care
iOS 26 Liquid Glass design with a dark, lit-stage look: notes glow while they sound and haptics trace the intervals. VoiceOver, Dynamic Type, Reduce Motion, and a shape system that never relies on color alone.
Fully offline. Truly yours.
No account, no ads, no analytics, no tracking — nothing ever leaves your phone. It works on a plane, in a rehearsal basement, anywhere.
Support
Questions, answered
Does the Find feature listen through the microphone?
No. Chordlight never uses the microphone. Find works by tapping: tap at least three notes on the fretboard or keyboard, and Chordlight identifies the scales and chords that match them. Everything happens on screen; nothing is recorded.
Which tunings and instruments are supported?
Guitar with 6 or 7 strings, in standard and alternate tunings including Drop D, DADGAD, Open G, and Open D — plus a full piano keyboard. Scales, arpeggios, and harmony work the same on both instruments.
Does Chordlight work offline?
Completely. Chordlight makes no network calls at all — no account, no ads, no analytics. Everything runs on your device.
Is Chordlight accessible with VoiceOver?
Yes. The board supports per-string VoiceOver navigation with rotors, Dynamic Type up to the largest accessibility sizes, Reduce Motion and Reduce Transparency variants — and every interval color is paired with a shape, so nothing depends on color alone.
Which devices does it run on?
iPhone 11 or newer running iOS 26.
How do I reach a human?
Email support@chordlight.app — it lands directly with the developer.