Privacy Policy

Effective November 2026

ZeptoPhysics is designed to work without collecting personal information. There are no accounts, and the calculators run entirely in your browser.

Information stored on your device

• Bookmarks. If you bookmark an explainer, the list is saved in your browser’s local storage on your device. It is never sent to us. Clearing your browser data removes it.

Sensor features

The optional Sensor DAQ panel can use your microphone, motion sensors or a USB serial device, only after you grant permission in your browser. Readings are processed locally to compute frequencies and values. They are not recorded or uploaded; the CSV export creates a file on your own device.

Third-party services

To load the site, your browser contacts these providers, which receive standard technical information such as your IP address and browser type:

• Cloudflare (hosting and content delivery), which may keep short-term server logs for security and performance.
• Google Fonts (typefaces).
• cdnjs (icon font).

Links to laboratories, journals and other external sites are governed by those sites’ own policies.

Cookies

ZeptoPhysics itself does not set cookies. If advertising is introduced in future, this policy will be updated before it goes live to describe the advertising partners, their cookies and how to opt out.

Children

The site is educational and suitable for all ages. We do not knowingly collect information from anyone.

Changes

We will post any changes to this policy on this page with a new effective date.