YIN
A modern standard for monophonic pitch tracking. YIN is optimized here for lower octave-error rates — fewer wrong octave jumps when the partials are messy.
YIN for lower octave-error rates
See what needles miss.
Free and Pro versions on the web. Built natively for iPhone and iPad. Try Pro features with a free 10-day trial.
Precision
Watch it lock into tune.
The rings reveal tiny pitch changes in real time. Tune until the pattern holds still, then play with confidence.
- See sub-cent pitch changes as movement
- Seven strobe rings reveal fine differences in pitch
- Five pitch-detection algorithms for different instruments and signals
Instruments
Every string. Every instrument.
Guitar, bass, ukulele, banjo, mandolin, fiddle — with 20+ built-in tunings from Standard to Nashville to Open G. Create custom tunings for any instrument.
- Six instruments with curated tuning presets
- Custom tuning creation for any string configuration
- Stretch compensation for accurate inharmonicity correction
Guitar
Standard
The reference set for modern guitar work.
A4 = 440
Tap any string for a single pitch, or choose a tuning to hear it as a chord.
Pitch detection
Five algorithms. One strobe.
In Precision, open Pitch Detector and choose from five tuned algorithms —YIN,Autocorr,MPM,AMDF, andCepstrum — optimized for different instruments and playing styles. Pair your choice with sensitivity and smoothing in the same panel.
Autocorrelation
PROThe classic time-domain approach. In the app we tune it for clean, steady signals — when your note is clear and noise is low, Autocorrelation gives a dependable fundamental.
Autocorrelation for clean signals
MPM
PROTuned for smooth tracking when you bend or use vibrato — the readout follows musical motion instead of jumping around.
MPM for smooth tracking through bends and vibrato
AMDF
PROAverage Magnitude Difference Function — a lighter-weight detector path for when you want the tuner to use less CPU (older devices, long sessions, or background load).
AMDF for low-CPU situations
Cepstrum
PROHelpful when the instrument puts a lot of energy in the overtones. Cepstrum-style analysis can track the fundamental more confidently if upper harmonics dominate the spectrum.
Cepstrum for instruments with strong upper harmonics
All five feed the same strobe: pick the detector that matches your signal — clean single notes, bends, harmonic-heavy timbres, or lighter CPU — then use A4 reference, in-tune zone, and strobe speed to match how you work.
Make it yoursYour color.
Your color.
Your frequency.
A little strobe. A lot of personality.
Your mic stays yours
All audio processing happens locally in your browser. No sound data is ever sent to a server. Your microphone input stays on your device — always.
Local processing
No audio uploads
Handcrafted in Oregon
Built for precision
Every detail engineered for professional-grade accuracy.
Strobe + cents
Seven-band strobe with clear cent-offset feedback
Web + iOS
Native iPhone app with offline tuning support
More algorithms
PROUnlock all five detectors to fit your instrument and signal
More temperaments
PROGo beyond free Equal temperament with Just, Pythagorean, Meantone, and well temperaments
Stretch tuning
PROPresets and custom tunings for more demanding setups
Metronome
PROSample-accurate timing with tap tempo, subdivisions, and accents
More visualizers
PROExplore four Pro visualizers, from Waveform to Kaleido
MetronomePRO
Get locked in
Practice with a metronome that is as visual as it is precise. Set the tempo, meter, subdivision, accents, and sound, then follow the strobe-style beat without losing your place.
- Tap tempo or dial in any speed from 40 to 220 BPM
- Flexible time signatures, subdivisions, and per-beat accents
- Three distinct click sounds with a synchronized visual pulse
Visualizers
See the signal, not just the note
Switch from harmonic detail to waveform, spectrum, studio-style levels, or a visual performance mode. Five views reveal a different side of the sound.
Signal EQ
See the harmonic balance of your signal as a field of responsive frequency bars.
Lumituner for iPhonePrecision.
Precision.
In your pocket.
A native strobe tuner made for iPhone. See tiny pitch changes, find your tuning, and keep time with a built-in visual metronome.
- Visual strobe
- Instrument presets
- Metronome
- Offline tuning
Release pending. The App Store listing will appear when the iPhone release is available.
See perfect pitch
One purchase
Own Pro on iPhone and web.
Pro is $12.99 USD once. Unlock the available Pro features on iPhone and web with the same Lumituner account. Sign up to try local Pro tools on ten days of your choice — skipped days don’t count.
ONE-TIME PURCHASENO ADSNO SUBSCRIPTION
Free
Free tuning
All supported instruments, standard tunings, and precise YIN pitch detection. No account needed.
- All supported instruments and standard tunings
- Strobe tuning with YIN pitch detection
- Automatic string selection
- Adjustable A4 reference
- Reference-tone playback and drone
- Sensitivity, smoothing, in-tune zone and strobe-speed controls
- Signal EQ visualizer (web)
No account required. Your audio stays on your device.
Start tuning — FreePro
$12.99one-time
Shared access with your account
- Everything in Free
- Alternate tuning presets
- Four additional pitch detectors: Autocorrelation, MPM, AMDF and Cepstrum
- Temperaments beyond Equal
- Stretch tuning presets
- Visual metronome with tap tempo, time signatures, subdivisions and accents
- Haptic metronome beats (iPhone)
- Custom tuning editor (web)
- Waveform, Spectrogram, Levels and Kaleido visualizers (web)
Bought Pro from Apple? In the iPhone app, open Account, sign in, and link your purchase. Then use that same account here. Apple purchases also work in the app without an account.
Lumituner Blog
tuningdesignproduct update
Your Color, Less Noise: Lumituner's Cleaner Tuner
Lumituner now carries your selected color through the tuner interface while removing decorative particles and expanding rings to keep the strobe in focus.
luthierintonationguitar setup
A Practical Guitar Intonation Checklist
A repeatable checklist for checking guitar intonation with open-string and 12th-fret comparisons before moving the saddle.
guitaralternate tuningshow-to
How to Tune a Guitar to Drop D
A quick Drop D tuning guide: which string changes, how to check the octave, and how to verify the result with a strobe tuner.
tuningguitaraccuracy
How Accurate Is an Online Guitar Tuner?
What determines online tuner accuracy, why microphone quality matters, and how a strobe display makes tiny pitch errors visible.
tuningstrobe tunerhow-to
How to Read a Strobe Tuner (Without Chasing Perfect Stillness)
Learn what left and right rotation mean, why a strobe tuner uses multiple rings, and why a tiny outer-ring shimmer can still mean you are exceptionally well tuned.
visualizerstuningproduct update
Five Ways to See Your Sound: Meet Lumituner's Visualizers
Explore Lumituner's five live audio visualizers: Signal EQ, Waveform, Spectrogram, Levels, and Kaleido. Each one reveals a different part of your sound.
tuninggearproduct update
Sharp or Flat? Now You Can Just Glance and Know
Lumituner has a new tuning meter under the strobe disc that shows flat, in tune, or sharp at a glance. Free, ported straight from the iOS app.
metronomepracticegear
Lumituner Now Has a Metronome — Free, and Actually On Time
A sample-accurate metronome built into the Lumituner web tuner: tap tempo, time signatures, accent patterns, subdivisions, and three click sounds. Included with Lumituner Pro.
guitartuningbeginner
Alternate Guitar Tunings: Drop D, Open G, DADGAD, and Nashville
A practical guide to common alternate guitar tunings, what they are used for, and how to tune them accurately.
tuningguitargear
Are Online Guitar Tuners Accurate?
Online guitar tuners can be accurate when they use the right pitch detection, microphone settings, and visual feedback. Here's what matters.
guitarluthierintonation
How to Set Guitar Intonation with a Strobe Tuner
Learn how to check guitar intonation, read 12th-fret pitch errors, and make practical saddle adjustments with a precise strobe tuner.
tuninggear
What Is a Strobe Tuner and Why Is It More Accurate?
Strobe tuners detect pitch deviations that needle and clip-on tuners miss entirely. Here's how they work and why professionals rely on them.
temperamenttheory
Why Equal Temperament Isn't Enough
Equal temperament is a compromise. Understanding alternative temperaments unlocks better-sounding chords and more musical tuning for specific contexts.
beginnerguitar
Setting Up Your First Guitar: A Tuning Guide
A practical guide to tuning your guitar accurately, understanding what tuning means, and getting the most out of a digital tuner.
Start tuning with precision
Open Lumituner in your browser. The native app for iPhone is coming soon.
Crafted by a luthier
Lumituner is built by David Ehlers, a luthier and product designer who got tired of imprecise tuners. Every feature comes from hands-on experience: building guitars, setting up instruments, and demanding accuracy that generic tuners can't deliver.
