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
Get in tune fast.
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
- Visual cues: counterclockwise = flat, clockwise = 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, and Cepstrum — 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.
Workbench
Workbench Mode for guitar techs and repair benches
Workbench Mode transforms Lumituner into a precision setup workstation for guitar techs. Measure open string and 12th fret readings, calculate saddle adjustments for intonation work, document setups with photos, manage your instrument library in the cloud, and check relief with precise before-and-after pitch reference.
- Six temperament modes including Just, Pythagorean, and Werkmeister III
- Intonation measurement with saddle offset calculation
- Neck relief checks with precise before-and-after pitch reference
- Cloud instrument library with photo documentation
- Client-ready session sharing and export
Workbench Mode ● Active
E2 -0.2 ¢
A2 0.1 ¢
D3 -0.1 ¢
G3 0.3 ¢
B3 -0.1 ¢
E4 0.0 ¢
Equal A4 = 440 Hz Stretch: On
iOS & iPadOS
Native on iPhone and iPad.
Lumituner is now a full native app on 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.
- Download free from the App Store — no account required
- Full-screen strobe disc optimized for iPad Pro and Air
- Works offline — no internet needed after install
- Native microphone access for lowest possible latency
E4
iPhone
A4
440.0 Hz
iPad
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
Workbench
Track instruments, offsets, photos, notes, and setup sessions
Web + iOS
Native iPhone and iPad app with offline tuning support
Pricing
One price. Yours forever.
Pay once and own it — no subscriptions, no renewals, no surprises.
NO SUBSCRIPTIONS NO ADS EVER
Free
$0 always free
- All instruments & tunings
- A4 reference tuning
- Accurate strobe display
- String playback & drone
- Visualizations
No account. No tracking. Just tuning.
Start tuning — Free
Most Popular
Pro
$7.99 one-time
- Everything in Free
- All pitch algorithms
- Additional visualizations
- Sensitivity & threshold controls
- Polyphonic strum detection
- Temperaments beyond Equal
- Stretch tuning presets
- Custom tunings
Workbench
$19.99 one-time
- Everything in Pro
- Workbench Mode workspace
- Instrument session tracking
- Per-string offset notes
- Session photos & annotations
- Cloud sync across devices
- Shareable instrument pages
From the Workbench
Thoughts from the bench.
guitar tuning beginner
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.
tuning guitar gear
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.
guitar luthier intonation
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.
tuning gear
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.
temperament theory
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.
beginner guitar
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 or download the native app for iPhone and iPad.
Crafted by a luthier
Lumituner is built by David Ehlers, a lousy comedian, 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.
