Privacy Policy

Last updated: September 2026

The short version

No accounts. No sign-ups. Your saved pool calculations are stored in your own browser's local storage — never sent to our servers.

What we collect

We may use privacy-respecting, aggregated analytics to understand which calculators are popular so we can improve them. This data cannot identify you personally. If you email us, we receive your email address and message solely to respond.

What we never do

We never sell personal data.
We never require an account to use a calculator.
We never see the pool dimensions or readings you enter — they stay in your browser.

Cookies and storage

Saved calculations use your browser's local storage so they persist between visits on the same device. Clearing your browser data removes them. That is the only thing we store. We do not use advertising or cross-site tracking cookies.

Changes to this policy

If we update this policy, we will update the date above. Continued use of the site after changes means you accept the updated policy. Our Terms & Conditions also apply.