Privacy

No ads, no third-party trackers, no accounts. We don't sell data.

What we collect

• Visit counts. We use Cloudflare Web Analytics, which counts page views without cookies and without identifying you.
• Nothing from the tools. The calculators run entirely in your browser. What you type isn't sent to us.
• Problem reports, if you send one. The report form stores the page and your message only, with no name, email or IP address. It uses Cloudflare Turnstile to block spam.

Children

This site is written for parents and students. We don't knowingly collect personal information from children under 13. We don't use cookies or accounts, and there are no forms that ask a child for personal details. If we ever add an email list, it will be for parents only.

Changes

If this policy changes, we'll update this page.

Last updated September 30, 2026.