Privacy policy

Last updated: 2026-10-10.

What we collect

We do not use tracking cookies or third-party analytics. The interactive guide saves your progress and unit choice in your own browser (local storage); it never leaves your device.

If you subscribe by email, your address is stored by our email provider and used only to send you new plans. Every email has an unsubscribe link.

Links to other sites

When you follow a link to Amazon, Facebook or another site, that site's own privacy policy applies, and it may set its own cookies.

Your rights

You can ask us to delete your email address at any time through the contact page.