Piano · Guitar · Ukulele · Banjo · Mandolin

Every scale and chord shape, on every instrument you play.

Fret & Key is a fast, offline reference for scales and chords, with a chromatic tuner, a listening chord detector, a key finder, and a metronome — all in one pocket-sized app.

Coming soon to the App Store See what's inside

Free to start. No account. No ads. Nothing to sign in to.

What it does

A practice-room reference that actually listens

Everything a working player reaches for, without hunting through tabs on the internet.

Scales for every key

Every scale and mode, in every key, mapped across the full neck or narrowed down to one playable position, labeled by note name or by scale degree.

Fretboard and keyboard

See the same scale or chord mapped on a guitar fretboard — alternate tunings included — or laid out on a piano keyboard, whichever you check your work on.

Tuner

A clean, accurate chromatic tuner that listens live and tracks pitch in real time as you tune each string.

Chord Finder

Strum a chord into the microphone and Fret & Key names it back to you — no typing, no searching.

Key Finder

Play a few notes or a riff and it listens and works out what key you're in — including the honest major/minor pair when the notes alone can't tell them apart.

Metronome

Four time signatures, tap tempo, and a beat indicator that keeps running even while you're looking at something else in the app.

Take a look

Built to read at a glance, on stage or on the couch

Fret & Key showing the D major scale mapped across the full guitar neck, root notes highlighted in orange
Every scale, across the full fretboard
Fret & Key showing the D major scale mapped across a piano keyboard, root notes highlighted in orange
Same scale, laid out on a keyboard
Fret & Key showing a D Dominant 7 chord diagram on the guitar neck
Every fingering for every chord
Fret & Key chord family view for D major, showing all seven diatonic chords as guitar chord diagrams
Every chord in the key, laid out at once
Fret & Key chromatic tuner showing an E4 string slightly sharp
A tuner that's always one tab away
Fret & Key chord detector identifying a strummed chord as Fmaj7
Play a chord, and it tells you what it is
Fret & Key key finder listening to a riff and detecting C minor
Play a riff, and it finds the key
Fret & Key metronome set to 130 BPM in 4/4 time, with tap tempo
A metronome that's always one tap away
Plays well with

One app, five instruments

Switch instruments without losing your place — the same key, scale, and chord stay put.

Piano
Guitar
Ukulele
Banjo
Mandolin
Pricing

Free to start. Pay once if you want more.

Guitar, the Major scale, the tuner, and the metronome are free for as long as you use the app.

Full Unlock
$7.99 one‑time
  • Every instrument — piano, guitar, ukulele, banjo, and mandolin
  • Every scale and mode beyond Major
  • Key Finder
  • One purchase. No subscription, no ads, ever.
Available in the app
Questions

Frequently asked

Does it need an internet connection?

No. Every scale, chord, tuner reading, and key/chord detection runs entirely on your device. There's no account and no network connection required to use the app.

What does Fret & Key do with my microphone?

The tuner, chord detector, and key finder listen live to detect pitch. That audio is processed in real time on your device and is never recorded, saved, or sent anywhere. See the Privacy Policy for the full details.

Is the Full Unlock a subscription?

No. It's a single $7.99 purchase that unlocks everything permanently. There are no subscriptions anywhere in this app.

I bought the unlock — how do I get it back on a new device?

Use Restore Purchases from the app's Settings screen. It's tied to your Apple ID, not a specific device.

Which instruments does it support?

Piano, guitar, ukulele, banjo, and mandolin. The fretted instruments — guitar, ukulele, banjo, and mandolin — also support alternate tunings and capo position.

Need a hand?

Questions, bug reports, or feature requests — a real person reads every message.

Get support