The BOSS Tuner app brings BOSS’s leading tuning technology to your favorite iOS and Android mobile devices. Available as a free download, the convenient app features the familiar look and intuitive display style of the best-selling TU-3 pedal tuner. Using the mic in your device, you can tune a guitar, bass, and other instruments like violin, cello, brass, etc. You can also use it to check pitch accuracy as you practice singing. In addition to chromatic tuning, the app can sound reference pitches for tuning by ear. And with the included newsfeed, you’ll always stay up to date with the latest info on BOSS artists and gear.

The BOSS Tuner app is available on the App Store and Google Play.


  • BOSS’s famous chromatic tuning technology in a free mobile app
  • Features the look and interface style of the top-selling TU-3 Chromatic Tuner
  • Provides hands-free chromatic tuning with a 21-segment meter, note display, and visual tuning indicators
  • Tune instruments and voices using the built-in mic in your mobile device
  • Audible reference pitch function for tuning by ear
  • Customizable background color
  • Newsfeed provides info on BOSS artists and gear
  • Compatible with iOS and Android devices