Cookies and Browser Storage

Last updated: October 4, 2026

What the application stores

The tuner doesn’t set cookies. It saves your A4 reference frequency in local storage on this device, when available, to restore it between visits. Choose 440 Hz in Settings to clear that preference. Audio readings, tuning progress and feedback drafts stay in temporary memory. Going back in your browser may restore the previous page. There are no accounts, ads or visitor-tracking scripts.

Microphone permissions

Your browser may remember whether you allowed the microphone. You can change that permission in its site settings.

Cloudflare hosting security

Cloudflare hosts this site and may set security cookies to check requests or protect against abuse. Your microphone audio is not sent to Cloudflare. See Cloudflare’s cookie documentation for details.

Your choices

You can inspect or clear this site’s data in your browser settings. Your browser also caches pages and downloads. Blocking cookies may affect Cloudflare’s security checks.

For audio processing, hosting requests and email feedback, read our privacy page. Questions can be sent to hughhao7@gmail.com.