Centronome: Tuner & Metronome
Precision tuning & solid tempo
Free · In-App Purchases · Designed for iPad. Not verified for macOS.
piano mode now shows string inharmonicity (B coefficient). Strobe display and a ±1-cent precision mode for setup work and daily practice alike.
Centronome puts a high-precision tuner and a rock-solid metronome on one screen. Tune while you keep time — no tab switching.
TUNER, BUILT LIKE AN INSTRUMENT
YIN pitch detection with FFT harmonic verification, based on current pitch-tracking research, for stable readings without octave errors
Resolution well below one cent on steady tones; Precision mode reads to two decimal places
Strobe display: the slightest drift shows as rotation — when the wheel stops, you're in tune
Four accuracy modes: Easy (±5 c), Normal (±3 c), Precision (±1 c), and Strobe
9 instrument presets: Chromatic, Guitar Standard, Drop D, Guitar High-Precision, Bass, Ukulele, Violin, Voice, and Piano single-note
Per-string targets: see which string you're closest to and how many cents remain
Piano mode estimates string inharmonicity (B coefficient) and the deviation of the second partial
A4 reference adjustable from 410 to 480 Hz in 0.1 Hz steps, sharp/flat notation, and a calibration offset for known hardware bias
Microphone input uses iOS measurement mode — no AGC or noise suppression coloring your signal
A METRONOME THAT DOESN'T DRIFT
Click timing is decided on the audio clock, immune to dropped frames and notifications — measured jitter is on the order of microseconds
20–300 BPM with tap tempo
Time signatures: 1/4–5/4, 6/8, 7/8, 9/8, 12/8
Subdivisions: quarters, eighths, triplets, sixteenths — with swing (50–75%) on even subdivisions
Fully editable accent pattern per beat; accents differ in timbre, not just volume
Four click sounds (Classic, Woodblock, Digital, Soft) and optional haptics
The pendulum and beat flash are derived from the actual audio output time, so what you see matches what you hear
USE BOTH AT ONCE
Tuner and metronome run side by side. When the click plays through the speaker, Centronome knows exactly when it happens and automatically discounts those moments in the pitch confidence. Headphones make simultaneous use even more stable.
NOTHING TO HIDE
An on-screen diagnostics view shows the sample rate, I/O buffer, analysis window, and real-time processing load.
ADS & PURCHASES
Centronome is free to use. A single one-time purchase removes ads permanently — there are no subscriptions.
PRIVACY
Microphone audio is analyzed on-device in real time only. Nothing is recorded, stored, or transmitted.
MADE FOR
Daily tuning of guitar, bass, ukulele, and violin
Warm-ups and intonation checks in wind bands and orchestras
Vocal pitch training
Intonation checks during repair and setup work
Observing the tuning state of a piano
Ratings & Reviews
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The developer, Code and DESIGN inc., 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
- Provider
- Code and DESIGN inc
- Size
- 4.6 MB
- Category
- Music
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
- English and Japanese
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Hide ads USD 3.99
- Copyright
- © 2026 Code and DESIGN inc.