Real-time pitch detection

Tuner

Tune any instrument with a clear needle-gauge readout, real-time pitch detection, instrument presets, custom temperaments, and stretch tuning — fully offline.

Download onGoogle Play

Scan to install

Needle gaugeReal-time pitchInstrument presetsCustom temperamentsStretch tuningSpectrum & historyOffline & privateLight / dark

Built for accurate tuning

Everything you need to tune with confidence

Read the needle, trust real-time pitch detection, pick your instrument, and fine-tune concert pitch, temperament, and stretch — all in one app.

Cent accurate

Needle-gauge readout

A bold target note, live cent deviation, and an animated needle with an in-tune tolerance band.

FFT + autocorrelation

Real-time pitch detection

Autocorrelation plus FFT with phase and polynomial refinement locks onto the pitch instantly.

String by string

Instrument presets

Pick guitar, bass, violin and more, tune string by string, or build your own custom instruments.

Editable

Temperaments

Tune to equal temperament and many historical temperaments, with a built-in temperament editor.

Custom curves

Stretch tuning

Configure and edit stretch-tuning curves for pianos and other instruments that need it.

No data collected

Offline and private

Only the microphone is used, on your device. Nothing is collected, stored remotely, or transmitted.

What you get

A precise readout, deep analysis, and full control

Land the needle in tune, dive into the spectrum and pitch history, tune string by string, and shape temperament and stretch without leaving the app.

**Needle-gauge readout**Note, cent deviation, and in-tune band

**Scientific view**Spectrum, autocorrelation, and history

**Instrument tuner**Tune string by string

**Temperaments**Equal and historical tunings

**Stretch tuning**Editable tuning curves

**Preferences**Concert pitch, FFT, and more

Your tuning workflow

From open string to perfectly in tune in seconds

Move from picking an instrument to a finished, in-tune string in a few taps: choose the instrument, read the needle, then fine-tune the reference pitch, temperament, and stretch to fit.

A bold note and live cent deviation make every adjustment obvious.
Spectrum and pitch history reveal exactly what your instrument is doing.
Concert pitch, temperament, and stretch tuning keep advanced setups accurate.

Pick your instrument

Choose a preset like guitar or violin, tune any note chromatically, or add your own instrument.

Tune to the needle

Watch the note, cent deviation, and needle settle into the green in-tune band.

Dial in the detail

Set concert pitch, choose a temperament, and apply stretch tuning to match your instrument.

Get the app

Download Tuner on Google Play

Scan the QR code from desktop or tap the button on mobile to start tuning with a precise, private, offline tuner today.

Tuner

Everything you need to tune with confidence

Needle-gauge readout

Real-time pitch detection

Instrument presets

Temperaments

Stretch tuning

Offline and private

A precise readout, deep analysis, and full control

From open string to perfectly in tune in seconds

Pick your instrument

Tune to the needle

Dial in the detail

Download Tuner on Google Play

Tune your next session with precision