Four ways to tune
Choose a digital meter, analog needle, or moving strobe. Poly mode displays readings across your strings in one view.
iPhone · iPad · Native Mac
Get in tune.
Make it your own.
Stringed Theory is a flexible tuner for guitar, bass, and ukulele. Pick your display, explore alternate tunings, and keep your setup close at hand.
Find your sound
One tuner. Plenty of possibilities.
Tune up or down
Shift any preset by −12 to +12 semitones with the virtual capo. From standard guitar tuning, −1 gives you E♭ standard and −2 gives you D standard.
Your tuning library
Start with standard, drop, open, and sweetened presets. Save custom tunings for four to eight strings with your own labels and frequencies.
Focus your reading
Use automatic string selection or lock onto one string. Input Sustain and Noise Gate help tailor the response to your playing environment.
A compact Mac companion
A native, borderless window with a grab strip, visible quit button, and a display that fits smaller workspaces.
Private by design
Pitch analysis happens on-device. No account, advertising, tracking, or audio uploads. Your presets and settings are stored locally.