A fast, accurate instrument tuner for guitar, bass and strings, with adjustable A4 and SF2 reference tones. Tune to standard in seconds.
From guitar to bass to any pitched instrument, ToneSight's tuner gets you in tune fast and free.
A clear needle-style tuner shows how flat or sharp each note is in real time, so tuning feels instant and precise.
Tune acoustic and electric guitar, bass, ukulele, violin, viola and cello — any string instrument with a clear pitch.
Calibrate the A4 reference pitch to match your instrument or ensemble — standard 440 Hz or any value you need.
Play SF2 reference tones to tune by ear, or use the meter for a visual read — whatever works best for you.

Yes. The tuner is part of the free core features of ToneSight, with no ads. It works on both iOS and Android.
Any pitched instrument: guitar, bass, ukulele, violin, viola, cello and more. You can also use it to tune your voice with reference tones.
No. All pitch analysis runs locally on your device, so you can tune fully offline.
Download ToneSight free and use the tuner anywhere — no account, no ads.