Privacy

The birth details you enter travel in the page address and are used to run the calculation. They are not written to a database and not kept after the page is served.

What is stored in your browser

• Your language choice
• Whether you prefer the light or dark theme

There are no tracking or advertising cookies, and no third-party analytics. Fonts are loaded from Google Fonts; nothing else is fetched from another site.

Uploaded images

A logo or banner uploaded through the settings page is stored on this server and served publicly as part of the site, as you would expect of a logo.