Free for everyone
Pluck one open string at a time and let it ring. The needle shows how far off you are in cents — centre it and the note locks green. No account needed, and it stays free.
Microphone off
—
— · target —
Waiting for a note…
The classic high-G sound. The 4th string is higher than the 3rd — that's on purpose.
G4
392.0 Hz
C4
261.6 Hz
E4
329.6 Hz
A4
440.0 Hz