The tuner listens through your microphone using the Web Audio API inside your browser. The audio is analyzed on your device, frame by frame, and discarded — nothing is recorded, nothing is stored, and nothing is transmitted. This site is static files; there is no server capable of receiving audio even if we wanted it.
The service worker caches the site's files so it works offline. Your instrument, tuning, and A4 setting live in the page URL (that's what makes links shareable) — in your address bar, nowhere else. No cookies, no localStorage profiles.
Aggregate, privacy-friendly page counts. No cookies, no fingerprinting, no identifiers. We know a page was viewed; we can't know by whom.
Fonts load from Fontshare (your browser requests font files from their CDN, which sees your IP as any CDN does). Hosting is Cloudflare Pages, which serves the files and keeps standard request logs. Neither receives audio or tuning data — it never leaves your device.
Mic access is requested only when you press start, used only while tuning, and released when you stop. Revoke it any time from the padlock menu; the tuner detects that and stops cleanly.
Contact us — privacy mail gets answered first.