yin pitch detection with harmonic verification. four strings glow when detected, lock green when tuned.

tap the instrument label to cycle between cello, violin, viola, and bass. detection range and filters adapt automatically.

tap metro to switch modes. ck mode sounds only beats 2 and 4 — carol kaye's approach for internalizing swing and locking the backbeat. trainer ramps tempo automatically from a start to a target over a set number of bars. four click tones in settings.

tap ∗ to export your fingerprints and settings as a json file, or restore from a previous backup.

three layers of isolation. tap room to capture ambient noise — the tuner subtracts it. tap learn to teach it your instrument's harmonic fingerprint. the tuner also auto-narrows a bandpass filter around whichever string it detects — the bandpass pill lights when locked.

tap a = 440 to adjust. presets for baroque, classical, and european orchestral tuning.

save to your home screen for fullscreen, offline use. on ios: tap share → add to home screen.