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Mobile App · iOS & Android

Ajax Guitar Tuner

See exactly how far each string is from perfect pitch — flat, in tune or sharp, to the cent. A smooth, vibrant gauge locks in with a glow, a tick and a chime, for acoustic, electric, bass and ukulele.

Free for 7 days, then one purchase · No subscription, ever

Download on the App Store Get it on Google Play
Ajax Guitar Tuner app icon
Features

Tune. Play. Go further.

A tuner, a metronome and a pitch pipe in one app — on iPhone, iPad and Android.

Tune anything

Acoustic, electric, bass (4, 5 or 6-string), ukulele and a chromatic mode. Automatic string detection, or pick a string and it advances for you. The headstock view lights up the string you are tuning, mirrored for left-handed players.

Accurate to the cent

A smooth gauge shows flat, in tune or sharp and locks in with a glow, a tick and a chime. Switch to the strobe display for fine tuning, with ±1 cent accuracy in Studio mode.

Every tuning

17 presets: Standard, Drop D, C, B and A, D and C Standard, Half Step Down, Open G, D, E, C and A, DADGAD and more, with bass and ukulele tunings included. Build your own with 4 to 8 strings, and set a capo fret so the tuner aims at the raised notes.

Hear it

Reference tones for every string so you can tune by ear. A pitch pipe and drone with pure, organ and reed sounds. A sample-accurate metronome from 30 to 300 BPM with tap tempo and subdivisions, which keeps playing while you switch tabs.

Made for real rooms

Room calibration sets the sensitivity for where you play, and the level meter tells you in plain words when it is too quiet, too loud or too noisy. Adjust the reference pitch from A4 = 432 to 446 Hz. Tuning history, day streaks, a capo calculator and a note frequency table are built in.

Private by design

Your microphone is used only to detect pitch. Audio is analysed on your device and is never recorded or uploaded. No account, no ads, no tracking - and it works completely offline.

Inside the app

See it in action

Clear at a glance, precise when you need it. Tap any screenshot to enlarge it.

Ajax Guitar Tuner - See exactly how far off you are: flat, sharp or in tune, to the cent
Ajax Guitar Tuner - Every string locks in with a glow, with a headstock view showing which peg to turn
Ajax Guitar Tuner - All six strings in tune, with sessions, streaks and history
Ajax Guitar Tuner - 17 tunings plus your own: drop, open, DADGAD or a custom tuning
Ajax Guitar Tuner - Sample-accurate metronome, 30 to 300 BPM with tap tempo
Ajax Guitar Tuner - Pitch pipe and drone with pure, organ or reed tones
Ajax Guitar Tuner - Dark or light theme, and a tablet layout
Ajax Guitar Tuner - Available in 8 languages
Available in 8 languages

Tune in your language

Switch languages any time inside the app.

  • English
  • Español
  • Français
  • Italiano
  • Deutsch
  • 中文
  • Shqip
  • Nederlands

Frequently Asked Questions

Common questions about Ajax Guitar Tuner.

It is free to download, and every feature is free for 7 days. After that, a single one-time purchase unlocks Ajax Pro forever. There is no subscription.

Acoustic and electric guitar, 4, 5 and 6-string bass, and ukulele, plus a chromatic mode for anything else. It detects the string automatically, or you can pick a string and it advances to the next one for you. Left-handed players can mirror the headstock view.

The gauge shows how many cents each string is flat or sharp. For fine tuning there is a strobe display, with ±1 cent accuracy in Studio mode.

Yes. There are 17 presets, including Drop D, C, B and A, D and C Standard, Half Step Down, Open G, D, E, C and A, and DADGAD, plus bass and ukulele tunings. You can build your own with 4 to 8 strings, set a capo fret, and adjust the reference pitch from A4 = 432 to 446 Hz.

No. The microphone is used only to detect pitch. Audio is analysed on your device and is never recorded or uploaded. There is no account, no ads and no tracking, and the app works completely offline.

Reference tones for every string, a pitch pipe and drone with pure, organ and reed sounds, a sample-accurate metronome from 30 to 300 BPM with tap tempo and subdivisions, room calibration, tuning history and day streaks, a capo calculator and a note frequency table.

English, Spanish, French, Italian, German, Chinese, Albanian and Dutch, switchable inside the app.

iPhone and iPad running iOS 15 or later, from the App Store, and Android devices, from Google Play. It includes dark and light themes and a dedicated iPad layout.

Get Ajax Guitar Tuner

Try every feature free for 7 days. After that, one purchase unlocks Ajax Pro forever — no subscription.

Download on the App Store Get it on Google Play