Reson8

Reson8 is a precision instrument tuner with professional-grade accuracy. Everything runs on your device: no ads, no accounts, and no internet connection required.

TUNE ANY INSTRUMENT
- Chromatic tuner with a fast, stable pitch display
- Guitar, bass, and ukulele with per-string guidance
- Wind instruments with transposition support
- Drum tuning, lug by lug: strike beside each lug and the map fills in round the hoop
- Professional piano suite with inharmonicity-aware tuning curves

BUILT FOR ACCURACY
- Fast, high-resolution pitch detection that settles in a fraction of a second
- Stable readings even in noisy rooms
- Adjustable reference pitch (A4) and alternate temperaments

PRIVATE BY DESIGN
- Microphone audio is analyzed locally in real time and never recorded or transmitted
- Anonymous usage statistics and crash reports help improve the app. They never include audio and are not linked to you

AVAILABLE IN 34 LANGUAGES
English, Arabic, Catalan, Chinese (Simplified and Traditional), Croatian, Czech, Danish, Dutch, Finnish, French, German, Greek, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Korean, Malay, Norwegian, Polish, Portuguese (Brazil and Portugal), Romanian, Russian, Slovak, Spanish, Swedish, Thai, Turkish, Ukrainian, and Vietnamese. The app follows your device language.

Whether you are touching up a guitar before a gig, checking a horn section, or laying a full piano tuning, Reson8 gives you the accuracy of professional tools in a clean, fast app.