Retune
Support
A tuner built around your tunings, for iPhone. Free on the App Store.
The fastest way to reach me is email. I read every message.
Email supportThe tuner isn't hearing my instrument
Retune needs microphone access. Check Settings → Retune → Microphone is on, and play close to the phone in a reasonably quiet room.
How do I change tuning?
Tap the tuning name at the top of the tuner (for example Standard ⌄) to pick another
one, or open the Tunings tab to browse the built-in and your own tunings.
Can I create my own custom tuning?
Yes. In the Tunings tab, tap +, choose an instrument, set the target note for each string, name it, and save. You can edit, duplicate, reorder, and delete your tunings any time. Custom tunings are part of the one-time Retune Pro unlock.
What instruments does Retune tune?
Guitar (6 and 7-string), bass, and ukulele. Guitar, bass and ukulele all tune free on their standard tunings, with eleven tunings built in. 7-string and any tuning of your own come from the tuning editor, which is part of Retune Pro.
What is Retune Pro, and is it a subscription?
Retune Pro is a one-time purchase, not a subscription. It unlocks the tuning editor (build and save your own tunings, for guitar, bass, ukulele or 7-string), the metronome, and iCloud sync for the tunings you build. The tuner itself and its eleven built-in tunings are free.
I bought Retune Pro on another device
Open Settings in the app and tap Restore Purchases. Pro unlocks for any device signed in to the same Apple ID.
Can I change the reference pitch?
Yes. In Settings, adjust A4 calibration anywhere from 415 to 466 Hz to match an ensemble or a fixed-pitch instrument. The default is standard concert pitch, 440 Hz.
Does it work offline?
Yes. Retune runs entirely on your device and needs no network connection. It works in airplane mode.