Tuner — tune any instrument in seconds

A fast, accurate instrument tuner for guitar, bass and strings, with adjustable A4 and SF2 reference tones. Tune to standard in seconds.

Everything you need to tune your instrument

From guitar to bass to any pitched instrument, ToneSight's tuner gets you in tune fast and free.

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Needle tuner

A clear needle-style tuner shows how flat or sharp each note is in real time, so tuning feels instant and precise.

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Guitar, bass & strings

Tune acoustic and electric guitar, bass, ukulele, violin, viola and cello — any string instrument with a clear pitch.

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Adjustable A4 reference

Calibrate the A4 reference pitch to match your instrument or ensemble — standard 440 Hz or any value you need.

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SF2 reference tones

Play SF2 reference tones to tune by ear, or use the meter for a visual read — whatever works best for you.

How to tune with ToneSight

  1. Open the Tuner in ToneSight and allow microphone access.
  2. Pluck or strum one string at a time near your phone.
  3. Watch the needle and note name — turn the peg until the needle is centered.
  4. Repeat for each string, using the adjustable A4 for custom tuning.
ToneSight tuner app

Tuner questions

Is the ToneSight tuner free?

Yes. The tuner is part of the free core features of ToneSight, with no ads. It works on both iOS and Android.

Which instruments can I tune?

Any pitched instrument: guitar, bass, ukulele, violin, viola, cello and more. You can also use it to tune your voice with reference tones.

Does tuning require internet?

No. All pitch analysis runs locally on your device, so you can tune fully offline.

Get your instrument in tune today

Download ToneSight free and use the tuner anywhere — no account, no ads.

Download on the App Store