Ajax Guitar Tuner

Ajax Guitar Tuner listens to your instrument and shows exactly how far each string is from perfect pitch — flat, in tune or sharp — on a smooth, vibrant gauge that locks in with a glow, a tick and a chime.

TUNE ANYTHING
• Acoustic, electric, bass (4/5/6-string), ukulele and a chromatic mode
• Automatic string detection, or pick a string and it advances for you
• Headstock view lights up the string you are tuning, mirrored for lefties
• Strobe display for fine tuning, ±1 cent accuracy in Studio mode

EVERY TUNING
• 17 presets: Standard, Drop D/C/B/A, D and C Standard, Half Step Down, Open G/D/E/C/A, DADGAD and more; bass and ukulele tunings included
• Build your own custom tunings with 4 to 8 strings
• Capo support: set the fret and the tuner aims at the raised notes

HEAR IT
• Reference tones for every string, tune by ear
• Pitch pipe and drone with pure, organ and reed sounds
• Sample-accurate metronome, 30–300 BPM, tap tempo, subdivisions, and it keeps playing while you switch tabs

MADE FOR REAL ROOMS
• Room calibration sets the sensitivity for where you play
• Level meter with plain-language hints: too quiet, too loud, noisy room
• Adjustable reference pitch (A4 = 432–446 Hz)
• Tuning history and day streaks, capo calculator, note frequency table
• Dark and light themes, iPad layout

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

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, works completely offline.

FREE FOR 7 DAYS, THEN ONE PURCHASE
Try every feature free for a week. After that, a single one-time purchase unlocks Ajax Pro forever. No subscription, ever.