Autocorrelation
AutocorrThe 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
The most accurate way to tune.
A professional strobe tuner for musicians, guitar techs, and luthiers. Free on the web, iPhone and iPad.
Precision
See what other tuners can't
Traditional needle tuners show you a rough estimate. Lumituner's strobe disc reveals sub-cent pitch deviations in real time — when the pattern locks still, you're perfectly in tune.
- YIN pitch detection algorithm for studio-grade accuracy
- Four-ring strobe disc with directional feedback
- Color-coded too: green in tune, blue when flat, magenta when sharp
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 —Autocorr,YIN,MPM,AMDF, andCepstrum — optimized for different instruments and playing styles. Pair your choice with sensitivity and smoothing in the same panel.
YIN
YINA 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
MPM
MPMTuned 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
AMDFAverage 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
CepstrumHelpful 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.
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 tracking
Handcrafted in Oregon
Built for precision
Every detail engineered for professional-grade accuracy.
5 algorithms
Choose the detector that fits the instrument and signal
Strobe + cents
Four-ring strobe with clear cent-offset feedback
Temperaments
Equal, Just, Pythagorean, Meantone, and well temperaments
Stretch tuning
Presets and custom tunings for more demanding setups
Pro Workspace
Track instruments, offsets, photos, notes, and setup sessions
Metronome
Sample-accurate timing with tap tempo, subdivisions, and accents
5 visualizers
See pitch and signal movement from five distinct perspectives
Web + iOS
Native iPhone and iPad app with offline tuning support
Metronome
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.
Pro workspace
A precision bench for techs and luthiers
The Pro workspace turns Lumituner into a setup workstation — intonation, relief, spec sheets, and a cloud instrument library, all in one place.
Your instrument library
Every instrument with its strings, gauges, and full session history — synced in the cloud.
Intonation sessions
Open vs 12th-fret readings per string, with the exact saddle adjustment calculated for you.
Neck relief worksheet
Log measured vs target gap and every truss-rod move, so setups stay repeatable.
Full spec sheets
Tonewoods, finish, hardware, binding — the whole build documented per instrument.
Photo documentation
Attach build and setup photos to each instrument for a visual record.
Setup notes
Timestamped notes on every job — new nut, saddle, string change, all on record.
Detailed intake
Maker, scale length, string gauges, owner contact — capture it all when an instrument hits the bench.
iOS & iPadOS — Coming soon
Coming soon to iPhone and iPad.
A full native Lumituner app is on the way to iOS and iPadOS. All the precision of the web version — with native microphone access, instant launch from your home screen, and a full-screen strobe experience built for iPad's large display.
- Free to download when it lands — Pro unlock is a one-time $12.99, no subscription
- Color-coded strobe: green in tune, blue when flat, magenta when sharp
- Built-in metronome with haptics and a strobe-style visual
- Swipe left or right to change strings — no menus
- Full-screen strobe optimized for iPad — and works offline
- Native microphone access for the lowest possible latency
E4
iPhone
A4
440.0 Hz
iPad
Free preview
Try Pro free for now.
Create a free workspace to save instruments, sync your setup notes, and try every Pro tool while we're in preview. No payment step.
NO PAYMENT REQUIREDNO ADSHELP SHAPE THE APP
Free
$0always free
No account needed. Just tuning.
- All instruments, standard tunings
- Accurate strobe display
- Metronome
- A4 reference tuning
- String playback & drone
No account. No tracking. Just tuning.
Start tuning — FreeMost Popular
Pro
$12.99one-time
Free while in preview
- Everything in Free
- All pitch algorithms
- Additional visualizations
- Sensitivity & threshold controls
- Polyphonic strum detection
- Temperaments beyond Equal
- Stretch tuning presets
- Custom tunings
- Pro workspace for setup & intonation
- Instrument session tracking
- Per-string offset notes
- Session photos & annotations
- Cloud sync across devices
- Shareable instrument pages
From the Workbench
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. Free, no account needed.
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 and iPad 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 real workbench experience: building guitars, setting up instruments, and demanding accuracy that generic tuners can't deliver.
