One Tuner vs Instrument Tuner

OneTuner does one thing and does it well. Open the app, play a note, and instantly see if you're in tune. The screen shows your note in solfege notation with a precision needle meter. When you're in tune, everything turns green. When you're not, you see exactly how many cents sharp or flat you are. There are no menus, no settings to configure, no buttons to press. OneTuner starts listening the moment you open it and stops when you leave. It works with any instrument — guitar, piano, violin, cello, ukulele, flute, voice, anything that makes a pitch. No ads. No account. No subscription. No internet required. No data collected. Your audio never leaves your device. OneTuner is the tuner you open when you just want to tune and get back to playing.

SimpliTuner is a fast, accurate chromatic tuner for any instrument: guitar, ukulele, banjo, mandolin, violin, and more. Play a note and SimpliTuner listens through the microphone and shows you the nearest pitch in real time, with a clean dial that tells you at a glance whether to tune up or down. FEATURES • Chromatic pitch detection works with any instrument, not just guitar • Precision and Practice dial modes: switch between a fine, precise reading and a wider, easier-to-read gauge for quick tuning • Adjustable A4 reference pitch (400–480 Hz) for orchestras, alternate tunings, or personal preference — saved automatically • Light and dark mode • Full VoiceOver accessibility support • No setup, no accounts, no sign-in — open the app and start tuning PRIVACY FIRST All pitch detection happens entirely on your device. Microphone audio is never recorded, stored, or sent anywhere. SimpliTuner has no analytics and no third-party SDKs. Nothing about you or your playing ever leaves your phone. Whether you're warming up before a gig or tuning your first guitar, SimpliTuner keeps it simple: open the app, play a note, get in tune.