Chord & Fret, whole, in your pocket

Interactive chords, scales and grooves, in any key and tuning — with a tuner, metronome and reharmonizer. 100% offline: your music does not depend on a signal.

Coming soon toGoogle PlayComing soon to theApp Store

Start free. Unlock everything with Pro. 100% offline.

What is inside

4 instruments · 16 tunings · in every key

Identify chord — the reverse path

Build the shape on the neck and the app names it, with inversions and enharmonics — the trick no competitor has.

41 chord types across 12 keys

Over 200,000 voicings and inversions — each with its diagram, fingering and audio.

57 scales mapped

Over 35,000 mapped scale shapes across the whole neck, with fingerings and guide tones.

Strumming & fingerpicking

Grooves by style with audio in time — from pop to bossa nova.

Precision tuner

A chromatic tuner with reference tones, ready before every session.

Metronome

Tap tempo and subdivisions to drill every change in time.

Transpose, capo & reharmonize

Move the whole chart to another key and put the capo wherever you like — both are free, and inside a chart the app even suggests the fret that opens the most shapes. Reharmonizing starts free too, at the gentle levels: every swap comes with the roman numeral, the diagram and the why. Letting it find the best capo on its own, the bold levels with all 16 named techniques, and reharmonizing a whole chart in one go come with Pro.

Your song charts

Paste a ready-made chart and it becomes sections; play along with the metronome at that song’s saved tempo and read it in stage mode. 3 songs on the free plan.

Real app screens

Search & fretboard

chord positions — Positions on the neck — every shape, with fingering and audio

scale search — Search any scale, in any key

scale detail — The whole scale on the neck — boxes or 3-notes-per-string; on the major modes, on guitar in standard tuning, with the CAGED forms named

Explore & learn

circle of fifths — Circle of Fifths — the scale, chords and dominants of every key

detector — Identify a chord — build the shape, the app names it

ear chord — Ear training — chord quality

Cadences

cadence catalog — Catalog by family and function

cadence detail — Every cadence explained — function, example and sources

cadence play — Play the cadence in any key — on the neck

cadence compare — Compare two cadences side by side

cadences chart — Find the cadences inside your chart

Reharmonization & jazz

reharmonize — Reharmonize like an arranger

reharmonize levels — By level — from subtle to jazz, with the why of each swap

jazz shell — Shell and drop 3 voicings — real jazz

Rhythm & practice

rhythm detail — Focused player — diagrams, key and tempo live

metronome — Metronome — meter, subdivisions and tap tempo

metronome trainer — Rhythm trainer — accelerando, silent bars and more

transpose — Transpose & capo — in one tap

Organize & settings

notebook — Notebook — your saved chords and starred scales, in folders

settings — Appearance, theme and language

settings instrument — Instrument, tuning, reference pitch and left-handed mode

settings account — Account — Pro status, upgrade and restore purchases

settings about — About the app — version and credits

Your chart, from rehearsal to the stage

The song you play becomes a rehearsal notebook: you paste the chart from anywhere, it turns into named sections, and the app remembers how YOU play that song — without ever rewriting the text you pasted.

Paste it and get the structure every bracketed marker opens a section — Intro, Verse, Chorus, Bridge or Ending — and a “2x” in the header already becomes the repeat.
Repeats and modulation per section each part plays 1 to 8 times and can go up or down by as much as 12 semitones — that is how “the last chorus goes up a half step”.
A performance road map the reading follows the order the song really sounds in, holds the screen on a repeating section when it fits, and obeys the jumps back to the middle and out to the ending (D.S. and Coda).
Transpose and capo without breaking anything the original text is never rewritten: reset it and the song comes back exactly as it arrived.
A key that says where it came from the app tells you whether you set the key, whether it froze at creation or whether it is a guess — and with too few distinct chords it would rather say “not sure” than print a wrong key.
The chart never wraps the chord stays over the right syllable, and stage mode enlarges everything so you can read it from a distance (the text size is your call while you paste or edit the chart).

Why offline matters

Music happens where the signal doesn't. The diagrams, scales and audio are generated on the device itself, so everything works with no connection — nothing to load, nothing to drop out mid-rehearsal.

In the rehearsal room, even with no Wi-Fi
On stage, never waiting on a signal
On the road, travelling, anywhere

Start free. Go Pro when you want.

The essentials are free; Pro is a subscription in the app — $7.99/mo or $59.99/yr, 14-day free trial.

The full chord and scale library, with audio
Tuner, metronome, transpose and reharmonize
Updates included — no extra cost
Free to start, no ads, 100% offline

Start free. Unlock everything with Pro. 100% offline.

Straight questions, straight answers

Is Pro a subscription?

Yes. Pro is a subscription: $7.99/mo or $59.99/yr, with a 14-day free trial and cancel anytime. The essentials stay free, no ads.

Does it work offline?

Yes, 100% offline. Diagrams, scales and audio are generated on the device — nothing depends on a signal.

Which instruments?

Guitar, electric guitar, cavaquinho and ukulele, with 16 tunings in total, in every key.

What does Pro unlock?

The complete library: over 200,000 voicings and inversions, over 35,000 mapped scale shapes, and the tools — precision tuner, metronome, transpose with capo, and reharmonize.

And this site?

It stays free. The essential reference for chords, scales, grooves and progressions lives here in the open — the app takes it all into your pocket and unlocks the entire library.