Retune - Guitar & Bass Tuner

Standard bass and ukulele tunings are free now. They used to be part of the Pro upgrade. Eleven tunings are built in.

Retune is the tuner built around tunings. Pick Drop D, Open G, DADGAD, or any of eleven presets, play a string, and Retune hears which one you mean, no tapping, no guessing. When you land the note, you feel it: a tap and a soft chime, and you move on to the next string.

TUNE BY TUNING, NOT NOTE BY NOTE Most tuners make you chase one note at a time. Retune loads the whole tuning: it detects which string you played, shows how far off you are in cents, and locks in when you hold it true. Tuning a guitar takes a minute, not five.

FREE, AND GENEROUS ABOUT IT

• NINE GUITAR TUNINGS BUILT IN: Standard, Drop D, Drop C, Half-step down, Whole-step down, Esus2 open, Open G, Open D, and DADGAD.
• BASS AND UKULELE, FREE: standard bass (E A D G) and standard ukulele (g C E A) are built in too.
• CHROMATIC MODE: tune any instrument to any note, with A4 calibration from 415 to 466 Hz.
• STRING LOCK: tap a string to pin the tuner to it when you are dialing in something tricky.
• A haptic tap and a chime when a string locks in tune, with four sounds to pick from. The core tuner is free forever: no ads, no account, works offline.

RETUNE PRO: ONE PURCHASE, NO SUBSCRIPTION

• CUSTOM TUNINGS: build and save your own presets for any tuning you play.
• EVERY INSTRUMENT: the tuning editor covers 6- and 7-string guitar, bass, and ukulele.
• METRONOME: a clean, accurate metronome with tap tempo, right in the app.
• ICLOUD SYNC: your custom tunings follow you to every device you own.

One-time purchase. No subscription, ever.

MADE FOR REAL PLAYING

• Reads your string through the mic with cent-level precision and a steady, jitter-free needle.
• Microphone sensitivity you can set for a loud room or a quiet one.
• Works offline, on stage or on the couch.
• Light on battery, instant to open, nothing between you and being in tune.

I'm one person, and I play. If a tuning you love is missing, you can build it in seconds with Pro, or say hello and it might ship built in.