Privacy Policy

Last updated: 24 October 2026

Your class lists

Names you enter are stored only in your own browser (localStorage). They are never sent to us or anyone else. You can delete them by clearing the list or your browser data.

Microphone

The noise meter analyses sound live on your device. Audio is never recorded, stored or transmitted.

Advertising and cookies

This site may show ads from third-party vendors, including Google. These vendors may use cookies to serve ads based on your prior visits to this and other websites. Google's use of advertising cookies enables it and its partners to serve ads based on your visits. You can opt out of personalised advertising at Google Ads Settings or aboutads.info.

Analytics

We may use privacy-friendly analytics to count page visits. No personal information is collected.

Contact

Questions about privacy can be sent via the contact details on the About page.