JustATuner

6.9easy start · #18of 32
in Musical Tuner Apps

Free to practise onyes
Free trialno
Well documentedyes
Runs where you workyes

Runs on Linux, Mac, Windows.

JustATuner is ranked #18 of 32 in musical tuner apps on The Geeks Club. It runs on Linux, macOS, Windows. There is a free plan.

JustATuner plans and pricing

All plans

Free Free Desktop tuner and just-intonation drone · open source stohrermusic.com · 2 Oct 2026

Compared on musical tuner apps

Free plan: Yes
Strobe display: Yes
Custom reference pitch: Yes
Intonation monitoring: Yes
Available platforms: desktop

Best JustATuner alternatives

See all 20

DaTuner Lesson 17.5 GuitarTuner.io Lesson 27.3 Cifra Club Tuner Lesson 37.2 Intunator Lesson 47.2 Pro Guitar Tuner Lesson 57.2 Fender Tune Lesson 67.1

The record

Product: JustATuner is a free, open-source desktop tuner for musicians with a stroboscopic tuner and a just-intonation drone.
Stroboscopic tuner: Its chromatic tuner has 12 wheels, one for each pitch class, with seven concentric rings per wheel.
Pitch settings: Users can configure reference pitch, instrument transposition, per-wheel cents bias, and per-ring octave bias.
Drone practice: The drone supports root, root-plus-fifth, major-triad, and minor-triad voicings, with a pure sine or harmonic-stack sound.
Interval analysis: A live meter reports the just-intonation interval and cents difference, and marks LOCKED within 5¢ of just intonation.
Visualizer: The drone’s Lissajous display visualizes interference between the played note and drone, with configurable phosphor color, trace thickness, trail count, and resolution.
Instrument support: Transposition options include Concert, B♭, E♭, and F, and pitch-detection presets cover saxophones, voice, brass, and strings.
Microphone and headphones: The app listens to a microphone for pitch detection; the maker recommends a quality microphone and strongly recommends headphones when the drone is on.
Supported systems: The maker lists Windows, macOS on Apple Silicon, and Linux; the macOS app is for M1, M2, M3, and M4 chips.
Linux requirement: Linux use requires PortAudio, and the downloaded binary may need its executable permission set.
Downloads and signing: Downloads are hosted on GitHub, and the maker says the app is not signed with a developer certificate, so the operating system may show a warning.
Source code: The source code is available on GitHub for inspection.
Support: The maker lists [email protected] for questions or feedback.
Maker: The software page identifies Matt Stohrer as the maker; his About page says he moved to North Carolina in 2010 and lives between Durham and Hillsborough.
Price from: Free

Where it ranks on The Geeks Club

Best Musical Tuner Apps in 2026#18 of 32

Is JustATuner yours?

Claim it for free: prove the domain, then correct facts, plans and screenshots. An editor reviews every change.

Claim it free Promote JustATuner

Sources

stohrermusic.com/software/justatuner/· checked 2 Oct 2026
github.com/stohrermusic/justatuner· checked 2 Oct 2026
stohrermusic.com/about/· checked 2 Oct 2026