Unlimited Tuner

Unlimited Tuner is a chromatic tuner built on a real pitch detection engine, the YIN algorithm from the research literature, implemented from scratch to hear the fundamental frequency, not a harmonic. When there is a note, the needle is accurate to a fraction of a cent. When there isn't, the display stays blank instead of guessing.

A detector you can trust: covers the full musical range from the bottom of the piano (A0, 27.5 Hz) to the top (C8, 4186 Hz), including bass drop tunings, ukulele, violin, voice, and whistling. Locked to the fundamental, so harmonic rich tones like saxophone, strings, and synths read as the note you're actually playing, not the octave above or below. Silence and room noise are filtered out, so a reading only appears when there's a real pitch to report. Works with built in mics and pro audio interfaces up to 192 kHz.

A needle that holds still: small wobble is smoothed for readability while real note changes register instantly, with no lag or jitter. Notes on the boundary between two names don't flicker back and forth. Plucked notes hold their reading long enough to actually read.

Tune string by string: pick your instrument, guitar, bass, ukulele, violin, viola, cello, mandolin, or banjo, each with the tunings players actually use, or stay chromatic and it reads anything. Alternate tunings are built in, including guitar Drop D, half and full step down, DADGAD, open G, D, and E, bass Drop D and 5 string, and ukulele low G and baritone. In an instrument tuning it snaps to the nearest string and tells you which one.

Historical and just temperaments: six temperaments included, Equal, Just Intonation, Pythagorean, Quarter comma Meantone, Werckmeister III, and Kirnberger III, each anchored to a tonic you choose and computed from exact ratios. Leave it on Equal for the plain chromatic tuner you already trust.

Capo and transposing instruments: put on a capo and the display shows the names you're actually fingering. B flat and E flat instruments like trumpet, clarinet, and alto sax read in their written pitch once you set the transposition. Only the displayed name moves, the measured pitch is exactly what the microphone heard.

A metronome that never drops a beat: clicks are scheduled in the audio buffer itself rather than a wall clock timer, so it doesn't drift or stutter. Set 30 to 300 BPM, 1 to 12 beats per bar with an accented downbeat, and quarter, eighth, triplet, or sixteenth subdivisions. Tap the tempo in if you don't know the BPM.

A drone to tune against: hold a steady reference tone at any note and octave to practice intonation the way string and wind players train their ear. One tap sets the drone to the note you're holding, and you control the volume to blend it under your instrument.

Strobe display: the classic strobe readout, concentric bands that appear to stand still when in tune, for dialing a string in precisely. Switch between needle and strobe anytime.

Calibration for real ensembles: set the A4 reference anywhere from 415 Hz to 466 Hz, or reset to standard 440 Hz with one tap.

Also included: color coded cents display, a scrolling pitch history ribbon on iPhone and iPad, a live harmonic spectrum view, haptic feedback on iPhone when you center a note, full keyboard control on Mac, and VoiceOver support throughout.

One purchase covers Mac, iPhone, and iPad. Every feature described here is in the app from the first launch. Nothing is a paid upgrade and nothing is behind a subscription. No account, no in app purchases, no ads, no analytics, and no tracking. Audio never leaves the microphone buffer. Nothing is recorded, nothing is stored, nothing is sent anywhere.