Trusted by 100,000+ guitarists, bassists and string players
The chromatic guitar tuner
for your wrist.
Sub-cent pitch detection for guitar, bass, ukulele and any string instrument. A 240-chord dictionary where every voicing plays, harmonic fields in all 24 keys, and a pro metronome. On Android phones and Wear OS smartwatches.
Sub-cent pitch detection for guitar, bass, ukulele, violin and any string instrument. Real-time Hz, cents and note name, with clear up-or-down direction so the peg never turns the wrong way.
Pro Metronome
40 to 240 BPM across four time signatures, from 2/4 to 6/4. Rhythm patterns down to triplets and sixteenths, tap tempo and visual beat indicator.
A4 Calibration
Reference pitch from 430 to 450 Hz. Use 432 Hz for natural tuning, 442 to 443 Hz for European orchestras, or lower for period instruments and historically informed performance.
Wear OS Companion
A full chromatic tuner on the watch, not a remote control. Listens through the smartwatch microphone. Available in 6 languages.
NEW
Special tunings
Visual presets for Drop D, Open G, DADGAD and more guitar tunings, plus ukulele, bass, violin and cavaquinho. Each string lights up when it hits the target note, with the chromatic engine below for double confirmation.
Chord dictionary
240 chords with 1945 voicings for acoustic guitar, electric guitar and ukulele, each one playing a string sound synthesized in real time. The same chord in every position on the neck, each shape with its name.
Harmonic Field
Pick any of the 24 keys and see the seven chords that live in it, with what each one does: rest, move away, pull back home. Every chord opens in the dictionary with its voicings and sound.
Common progressions
17 curated progressions in three families: essentials, pop and jazz. Written in degrees, so the I-V-vi-IV that carries half of pop music transposes to any key with one tap.
Tetrads & jazz
The same field in seventh chords: Cmaj7, Dm7, G7 instead of C, Dm, G. The seventh changes the flavor, not the function, and jazz staples like the ii-V-I are one toggle away.
Preview
See it in action
Frequently Asked
Questions, answered.
Is TunerWear free?
Yes. The tuner, the full chord dictionary with sound, the harmonic fields and the metronome are free with ads. One rewarded video opens Premium for 12 hours; there is also a lifetime one-time purchase. Trying the app never asks for a card.
Does tuning need internet?
No. Pitch detection runs entirely on your device: tuner, chord dictionary, harmonic fields and metronome all work with no connection. Only the ad-based unlock needs internet, to serve the ad. No account, no sign-up.
Which instruments does TunerWear support?
Guitar, bass, ukulele, violin, viola, cello, mandolin, cavaquinho, and any string instrument: the chromatic mode picks up any pitch from your microphone.
Is there a Wear OS version?
Yes. TunerWear ships a dedicated Wear OS app so you can tune straight from your wrist, without pulling out your phone.
How accurate is the tuner?
Sub-cent precision from an MPM (McLeod Pitch Method) engine written in C. MPM separates a note's fundamental from its own harmonics, which is what keeps the reading stable instead of jumping octaves.
Can I change the A4 reference frequency?
Yes. A4 calibration lets you tune to any reference from 430 to 450 Hz. Default is 440 Hz (modern concert pitch). Use 432 Hz for natural tuning, 442 to 443 Hz for European orchestras like Vienna or Berlin, or lower references for Baroque and Classical period instruments.
Does it include a metronome?
Yes. 40 to 240 BPM, four time signatures (2/4, 3/4, 4/4, 6/4), rhythm patterns including eighths, triplets and sixteenths, tap tempo and a visual beat indicator.
Is there a chord dictionary?
Yes. 240 chords with 1945 voicings for guitar, electric guitar and ukulele. Every voicing plays a string sound synthesized in real time, so you can hear the chord before you play it.
What permissions does the app need?
Just the microphone, used solely for live pitch detection. Nothing is recorded, uploaded or stored.
Does the tuner work in noisy rooms?
It works best in a quiet space, but the built-in noise rejection and frequency smoothing help maintain a stable reading even with mild background noise.
Does it support electric guitar?
Yes. The chord dictionary has separate diagrams for acoustic and electric guitar, plus ukulele.
Can it teach me why chords go together?
That is the Harmonic Field: pick any of the 24 keys and see its seven chords, what each one does (rest, move away, pull back home), and 17 progressions written in degrees that transpose to any key with one tap. It is a reference, not a course.
Which tunings does it support?
Any tuning, because the chromatic engine shows the exact note and cents instead of locking to presets. Standard EADGBE, drop D, drop C, open G, open D, DADGAD, half step down (Eb) and full step down all work directly. See our tunings guide for details and artist examples.
How is sub-cent precision possible?
The engine is MPM (McLeod Pitch Method), written in C and shared with the watch app. It compares the signal with itself to find the true fundamental, ignoring the harmonics that fool simpler detectors. The result is a stable reading below one cent, even on entry-level phones.
Do I need a smartwatch to use it?
No. TunerWear works as a regular Android tuner app. If you have a Wear OS smartwatch, the companion app tunes directly from the watch microphone, without needing the phone in hand.
Ready to play?
Your perfect pitch starts here.
Download Tuner Wear for free. Tune, learn chords and harmonic fields, practice with the metronome. No account, no sign-up, no card.
