Privacy policy

Last updated October 11, 2026

What we collect

• Analytics: we measure visits with an analytics service to learn which pages help people. It records things like pages viewed, approximate location (country or region), device type and the site that sent you.
• Email: if you email us or join our email list, we keep your email address to reply or send updates.
• Calculators: the numbers you type into calculators stay in your browser. We do not send them to our servers.

Affiliate links

When you click a link to a store, that store may set cookies to track the referral. Their privacy policy covers that data.

Your choices

You can block cookies in your browser settings. To have your email address removed, use the unsubscribe link in any email or write to [email protected].

Changes

We update this policy when our practices change and show the date at the top.