What we collect: almost nothing

The calculator runs on your own phone or computer. The numbers you type are not sent to us or to anyone else.

The site is hosted on Vercel, which keeps normal server logs (your IP address, browser type, and the page you asked for) to run the service.

Since 08-23-2026 the site uses Google Analytics 4 to count visits. It records which pages are viewed, roughly where visitors are from, what device they use, whether the calculator was used (not the numbers typed), and which outside links are clicked. IP addresses are anonymized. We use this only to see which pages help people. You can block it with any ad or tracker blocker and the site works the same.

Google Analytics sets its own cookies; we set none of our own. We collect no email addresses. We sell no data.