Native macOS App
Guitar Tuner for MacNative. Offline. ±1¢ Accuracy.
A native macOS tuner that lives in your menu bar, reads your interface at full sample rate via Core Audio, and runs entirely offline. Eight tuning presets, capo, custom A4. No account, no telemetry.
Built for Guitarists
Why Guitarists Pick a Native Tuner Over a Browser Tab
A browser-based tuner is convenient — open a tab, click Allow, tune. The problem starts the moment your playing gets fast: WebAudio adds 12–60 ms of jitter on top of the system input latency, the tab gets throttled when you switch to your DAW, and Chrome's auto-gain control fights the YIN algorithm for control of the signal.
Chromatic Tuner runs natively on Core Audio at full sample rate — usually 48 kHz from a built-in mic or 96/192 kHz from a USB interface. The 31-LED meter responds in under 50 ms from pluck to display, fast enough that you can hear and see the same beat at the same time. That makes intonation work, tremolo passages, and tuning the high E on a 7-string actually feel responsive.
Guitar-specific extras: presets for Standard, Drop D, DADGAD, Open G, Half-step Down, and 7-string E. Capo positions 1–11 shift the meter's target frequencies so you read the fretted note as if you were in standard tuning. ±11-semitone transpose covers capo'd songs in band keys, B♭ trumpet charts read on guitar, and any orchestral A4 from 415 Hz period instruments to 442 Hz European reference.
It lives in the macOS menu bar (360-pixel popover, opens in 200 ms) or in a floating always-on-top window for stage use. No subscription, no account, no telemetry — $6.99 one-time with lifetime 1.x updates.
Why a Native App
A Real Tuner, on Core Audio.
Browser tuners reroute audio through the WebAudio sandbox — 12–60 ms of jitter, silent downsampling, throttled the moment the tab loses focus. Phone tuners can't see your audio interface at all — just the built-in mic, with auto-gain and noise suppression already mangling the signal before any pitch detector touches it.
Chromatic Tuner sits directly on Core Audio. It sees your USB interface at full sample rate, runs YIN on your CPU, and the needle responds the moment you pluck.
Two Display Modes. One Tuner.
The 31-LED bar is what you reach for when plucking — segments blend orange to green and snap to in-tune in under 50 ms.
The Peterson-style rotating strobe is the one for sustained intonation work. Bands lock inside a hard ±0.5 ¢ deadband, so "in tune" is genuinely stationary — not just close.
What's Inside
Nine Things, Done Well.
A tuner should be on screen for fifteen seconds, do its job, and get out of your way. Everything below earns its place by that rule.
YIN Pitch Detection
A0 to C8 (27.5 Hz – 4186 Hz). ±0.14¢ on pure tones, ±1¢ real-world. Octave-error correction for plucked strings, ~22 Hz update rate.
8 Historical Temperaments
Equal, Just, Pythagorean, ¼-comma Meantone, Werckmeister III, Kirnberger III, Vallotti, Young II — with movable tonic for non-equal systems.
Two Display Modes
LED bar with hardware-accurate ticks and a Knight-Rider intro, or a true Peterson-style rotating strobe with a hard ±0.5¢ deadband.
Instrument Presets
Guitar (Standard, Drop D, DADGAD, Open G, half-step down, 7-string), bass (4 + 5-string), violin, viola, cello, double bass, ukulele, mandolin, banjo. Capo through fret 11.
Reference Tones
Tap any string row to play a clean sine reference. Keyboard shortcuts c d e f g a b. Soft envelope, 3-second auto-stop, honors your A4 calibration.
Lives in Your Menu Bar
Tuning-fork icon opens a 360 px popover in under 200 ms. Tune, dismiss. Or float the main window with always-on-top for stage use.
Custom A4 + Transpose
A4 reference 349.0–499.9 Hz in 0.1 Hz steps. One-tap presets for 415 / 440 / 442. Transpose ±11 semitones for B♭ trumpet, A clarinet, capo'd guitars.
Light, Dark, System
Theme follows macOS or pin it. The display panel stays a deep amber-on-black either way — the meter is what your eye locks onto.
Keyboard-First
Space starts and stops listening. ⌘W / ⌘Q standard. No mouse needed for the basics.
Design
Lives Wherever You Need It.
A 360 px popover that drops out of the menu bar between takes. Customization tucked behind a flyout. A dock icon that earns its slot. Every surface modeled on real hardware, then matched to your system theme.
How It Works
Three Steps. The Third One Is the Only One You'll Do Twice.
- 01
Open Chromatic Tuner
Drag from the DMG to Applications. Launch from Spotlight or your menu bar. No account, no activation.
- 02
Allow Microphone Access
macOS asks once. Approve, and your default input — built-in mic, USB interface, whatever — is wired in. Audio stays on-device.
- 03
Pluck a String
The LED meter sweeps to the closest note. Amber means off, green means in. Tune until it stays green for a beat.
New · iPhone & Apple Watch
Also in Your Pocket.
ChromTuner: Guitar Tuner brings the same YIN engine to iOS — free. Chromatic mode, Standard E and Drop D, the LED meter and analog needle, plus a gentle haptic tap the moment a string locks in. Since 1.1 it tunes from your Apple Watch too. One $6.99 purchase unlocks everything else.
Free forever — no ads, no account, no subscription.
Prefer the Mac App Store? Same app, same price.
Ready When You Are
One Purchase. Forever Yours.
Today's Total
One-Time · Lifetime 1.x Updates
- Chromatic Tuner — Universal Binary (Apple Silicon + Intel)
- Lifetime 1.x Updates Included
- Direct Email Support From the Developer
After You Pay
- 1Receipt to Your Email
- 2Download Link, Valid 7 Days
- 3Drag Chromatic Tuner Into /Applications
FAQ
Questions, Answered.
Quick answers about temperaments, instruments, accuracy, and what actually runs on your Mac.
How Is Chromatic Tuner Different From Free macOS Tuners?
Chromatic Tuner runs natively on Core Audio with sub-50 ms latency, ±1¢ YIN accuracy, no ads, no telemetry, and no account. Free tuners typically run in a browser tab (12–60 ms of WebAudio jitter) or hand the signal to a phone's built-in mic — auto-gain and noise suppression baked in before the tuner ever sees it. The $6.99 buys lifetime 1.x updates and direct email support.Does It Run on Intel Macs and Apple Silicon?
Yes — both. Chromatic Tuner is a universal binary that runs natively on Apple Silicon (M1/M2/M3/M4) and Intel Macs. macOS 14 Sonoma or later required.Does Chromatic Tuner Work Offline?
Yes. Chromatic Tuner runs entirely offline — no audio, telemetry, or account ever leaves your Mac. The app makes zero outbound network connections, and pitch detection runs locally on the CPU.Does It Support Alternate Tunings, Capo, and Other Instruments?
Yes. Chromatic Tuner ships with 15 instrument presets: guitar (Standard, Drop D, DADGAD, Open G, Half-step Down, 7-string), bass (4-string EADG, 5-string BEADG), bowed strings (violin, viola, cello, double bass), folk (ukulele, mandolin, 5-string banjo), and pure chromatic. Capo position (off through fret 11), A4 reference, and ±11-semitone transpose are all adjustable.Can I Run It From the Menu Bar Only?
Yes. Enable Menu Bar mode in preferences and a 360 px popover appears next to your other menu-bar icons. The main window can stay hidden.How Accurate Is the Tuner?
Chromatic Tuner is accurate to ±0.14 cents on pure sine tones and ±1 cent in real-world use. The in-tune zone (green) opens at ±5 cents, which is what most studio engineers consider perfect intonation. Detection uses the YIN time-domain algorithm with a 4096-sample window, octave-error correction for plucked strings, and median-of-5 + exponential smoothing for stable readings at ~22 Hz.Is There a Free Trial?
There's a free browser-based version at chromtuner.com/tune that runs the same YIN engine — try it before you buy the Mac app. The desktop app adds Core Audio (sub-50 ms vs 12–60 ms in the browser), 15 instrument presets, 8 historical temperaments, capo / transpose, menu-bar mode, and offline use. If you're still on the fence after the browser version, email support@chromtuner.com for a direct reply, usually within a few hours.
Ready to Tune?
Native macOS. Offline. ±1¢ accuracy. Yours for $6.99 — one-time, lifetime 1.x updates.
Buy for $6.99Specifications
The Technical Bits
| Operating System | macOS 14.0 (Sonoma) or later |
|---|---|
| Architectures | Apple Silicon (arm64) + Intel (x86_64), universal binary |
| Pitch Algorithm | YIN, 4096-sample window with 50% overlap |
| Pitch Range | A0 (27.5 Hz) → C8 (4186 Hz) |
| Accuracy | ±0.14¢ on pure sines, ±1¢ real-world |
| Update Rate | ~22 Hz |
| Latency | Sub-50 ms perceived |
| Smoothing | Median-of-5 + exponential, 70 Hz high-pass before detection |
| Audio Input | Built-in mic, USB interfaces, Aggregate Devices, hot-plug detection |
| Temperaments | 8 historical, with movable tonic for non-equal systems |
| Instrument Presets | 15 across guitar, bass, bowed strings, folk strings, chromatic — plus capo |
| File Size | ~5 MB DMG |
| Network | None — works fully offline |
| Privacy | Sandboxed, Hardened Runtime, Privacy Manifest, no telemetry |
| Updates | Lifetime updates for the 1.x line, included with purchase |
| License | Personal one-time purchase, single user |
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