A calm, precise tuner. Free, with nothing to sign up for.

Play a string and Twangle shows the note and how far it is from being in tune, to a single cent. Then it helps you play: chord names, chord charts, scales, the capo, ear training and a metronome.

Every feature freeNo in-app purchases, no subscription.
No adsNot now, not later.
No accountOpen it and tune.
Nothing leaves your phoneTwangle has no permission to use the internet.

The tuner

Tune any instrument

Guitar (6, 7, 8 or 12 strings), bass (4 or 5 strings), ukulele, 5-string banjo, violin, viola, cello and mandolin, in the common tunings or your own. The chromatic tuner does any other instrument, or your voice.

A word under the meter says which way to turn the peg, Tighten or Loosen, and the screen eases from amber to green as the string comes in tune.

Twangle speaks with TalkBack, can guide you by vibration alone, works with large text, and comes in 36 languages.

How the tuner works · All instruments and tunings

The tools

Twangle has three tabs: Tune, Metronome and Practice. Practice opens on a list of its tools, Chords, Scales, Capo, Ear training and Pitch trail, with the one you used last at the top. Settings is the gear at the top left.

Tuning

The tunerPlay a string, see how far it is from being in tune. Strum checkStrum all strings and see which ones are off. 12th-fret checkLearn whether a string's saddle should move.

Listening

Chord nameStrum a chord, see its name.

Practice

MetronomeSteady time from 30 to 250 beats a minute. ChordsChord charts for your instrument and tuning. ScalesEvery note on the neck, with a drone to play over. CapoPick the song's key; see where the capo goes. Ear trainingPlay back a note you hear; name intervals and chords by ear. Pitch trailSee how steady a note, a bend or your vibrato is.

Instruments and more

Instruments and tuningsTwelve instruments, lowered tunings, tunings of your own. Left-handedChord charts and the scale neck the other way round. The widgetYour tuning on the home screen; one tap opens the tuner. On the watchA tuner on your wrist that needs nothing from your phone.

A look inside

Your instrument and tuning
The chord you strum, by name and chart
A metronome that keeps time
Every practice tool on one tab

The story

Why I made Twangle

I play guitar, and I have written software for more than twenty years. Tuning should be the easy part: pick up the guitar, play a string, turn a peg. Yet the popular tuner apps ask for something back first. They put tunings, the metronome or the strobe behind ads or a subscription, and every one I compared collects some data, for a job that only needs to listen.

So I made the tuner I wanted to use myself. It listens only while it is on the screen, keeps nothing it hears, and has no permission to go online, so it couldn't send anything anywhere even if it tried. Every feature is in it from the start, for everyone, and it stays that way.

I had never made an Android app before. Twangle was written together with Claude, an AI: I decided what it should do and how it should feel, and tried it on real guitars; Claude wrote the code. One small step at a time, it grew from a tuner into a little practice room.

And the name? A twang is the ringing sound of a plucked string. The logo is one moment of that sound: the string's first three harmonics, the whole string in amber, its halves in blue, its thirds in green, the colours they make together where they meet. Tap it at the top of this page, and it rings again.

Ready when you are

Twangle is free on Google Play, for Android 8 and later.