A fast, accurate tuner with a colour for every note. The meter snaps to a single green the instant your string lands — on guitar, bass, ukulele and banjo.
Twelve pitch classes, twelve hues — the same chromatic system as Chordology. The big note letter is always tinted by its pitch, so E is olive and A is indigo, every time you tune.
Read the note by its colour before you even read the letter.
A second colour channel reads accuracy, not pitch. The LED meter runs amber while you’re off and resolves to one clean green the moment you’re within four cents — no numbers to read, no guessing.
Segments light wide in red the further your string sits from the target pitch.
Amber narrows toward the centre as you turn the peg the right way.
A single tall green bar and a soft haptic the instant you land it.
Let Centz find the string for you, follow it through one string at a time, or pick the string yourself. Coarse to lock on fast, fine to zoom in on the last few cents.
Guitar, bass, ukulele and banjo — standard plus drop, open and alternate tunings, each string in its colour.
Tune to any concert pitch from A = 430 to 446 Hz, with one-tap presets for 432, 440 and 442.
Listens through the mic and analyses pitch live on your phone — nothing is ever recorded or sent anywhere.
Free on iPhone. A colour for every note, a single green when you nail it.