Privacy policy

What we collect

We use Cloudflare Web Analytics for anonymous, aggregate site usage data. We also send a same-origin event when a calculator is started or successfully completed. Each event contains only the site ID, page path, event name, and a count of one; the server stores hourly aggregate counts.

We do not send or store calculator inputs, calculator results, prices, filenames, query strings, IP addresses, user-agent strings, referrers, email addresses, cookies, persistent identifiers, or fingerprints in this event system. Calculator inputs and results stay on your device.

Cookies

This site does not set cookies. Because we do not set cookies, there is no cookie consent banner and no cookie preferences to configure.

Third parties

Cloudflare provides hosting, the aggregate event database, and Cloudflare Web Analytics. We do not use Google Analytics, Facebook Pixel, or any advertising or retargeting network. We do not embed third-party fonts, YouTube videos, or social widgets.

If we add third-party services in the future — for example, an affiliate link tracker or an email newsletter platform — this policy will be updated before those services go live, and we will disclose them explicitly on the disclosure page.

Your rights

Because we do not collect personally identifiable information, we cannot associate any data with a specific individual. There is no user account to delete, no email list to unsubscribe from, and no personal data to request export of.

If you have a specific privacy question, contact us via the address on the disclosure page.

Changes to this policy

If we materially change how we collect or use data, we will update this page and the "Last updated" date at the top. Minor clarifications will not trigger a version bump.