Ajax Guitar Tuner & Metronome

Get in tune in seconds — then stay there.

Play a string. Ajax hears it straight away and shows you exactly which way to turn the peg, on a big, clear gauge that glows and chimes the moment you land on it. No guesswork, no squinting at a tiny needle.

NEW TO GUITAR? IT WALKS YOU THROUGH IT
• Tells you which string you are on and which way to turn
• Moves on to the next string by itself once one is done
• A picture of your headstock lights up the peg you are turning
• Left-handed? The whole thing mirrors

TUNES WHATEVER YOU PLAY
• Acoustic guitar, electric guitar, bass (4, 5 or 6 string) and ukulele
• Chromatic mode handles mandolin, banjo, violin and just about anything with strings
• Drop D, Drop C, Open G, DADGAD and 13 more tunings ready to go, or build your own
• Using a capo? Tell the tuner which fret and it does the maths for you

ACCURATE ENOUGH FOR THE STUDIO
• Down to 1 cent, with a strobe display when you want it perfect
• Still works at band practice, in a shop, or anywhere noisy
• Set your reference pitch anywhere from 432 to 446 Hz

THE REST OF YOUR PRACTICE KIT
• Metronome with tap tempo that keeps ticking while you tune
• Reference tones, pitch pipe and drone for tuning and practising by ear
• Capo calculator, note chart, and a record of every session you play

NO ADS. EVER.
No banners, no pop-ups between strings, no account to create. Ajax works completely offline, and your microphone is only ever used to hear the note — nothing is recorded, nothing is sent anywhere.

Speaks English, Spanish, French, Italian, German, Chinese, Albanian and Dutch.

Every feature is unlocked free for your first week. After that, one purchase keeps Ajax Pro forever — no subscription, ever.