Tuner · Baro
Pitch-perfect, fully offline
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Tune your instrument with a clear, steady readout. Pitch detection runs on your phone — offline, no account, no ads.
Your audio never leaves your phone.
Tuner is a chromatic tuner that listens through your microphone and tells you the exact note you're playing — entirely on your device. No internet, no account, no tracking. Don't trust it? Turn on airplane mode: turn off Wi-Fi and cellular, and it keeps working. Nothing is ever recorded, and nothing is ever uploaded.
Play a string, press a key, or sing a note. A big, clear note name fills the center (like A4), with the live frequency in Hz and a smooth 180-degree needle that swings with every cent. The moment you land in tune, the whole note glows yellow — you tune by feel, not by squinting at numbers.
WHY OMITTUNER IS DIFFERENT
Every free tuner pays its bills with ads, accounts, or tracking of mic-adjacent data. Every "pro" tuner gates real accuracy behind a monthly subscription. Tuner does neither. Pay $0.99 once. No ads. No subscription. No account. Yours forever.
PRIVATE BY DESIGN
• Microphone audio is analyzed in memory and discarded instantly — never written to disk, never uploaded.
• Pitch detection runs 100% on device with pure-DSP YIN math. No machine-learning model, no cloud, nothing sent to any server.
• Zero analytics, zero telemetry, zero third-party SDKs. Privacy label: Data Not Collected.
WHAT IT DOES
• Real-time pitch detection, fast enough to follow your tuning peg as you turn it.
• A huge, readable note name plus the live frequency in Hz — legible across a music stand.
• A 180-degree needle that leans flat or sharp, and glows when you're within 5 cents.
• Adjustable concert-pitch reference — 432, 438, 440, 442, or 444 Hz, one tap, remembered next time.
• The screen stays awake mid-session so you can keep both hands on the instrument.
GREAT FOR
Guitar, bass, ukulele, violin, cello and other strings; brass and woodwind intonation checks; singers and choirs warming up; piano reference checks; students and teachers in any room.
HONEST ABOUT WHAT IT IS
Tuner reads what your microphone hears using 12-tone equal temperament to within about 5 cents, across 25–4500 Hz. It's an excellent everyday and practice-room tuner — it isn't a studio strobe and doesn't claim that precision.
ONE-TIME PURCHASE
$0.99 once. No subscriptions, no in-app purchases, no ads. That's the whole deal.
Part of the Baro family — The tools you reach for first.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Small UI cleanup and improvements.
The developer, Euiseok Kim, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Euiseok Kim
- Size
- 20.5 MB
- Category
- Music
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and Korean
- Age Rating
4+
- 4+
- Copyright
- © 2026 Lion and the Lab