Privacy Policy

Last updated: October 17, 2026

What you enter stays on your device

Calculations happen on your device; the numbers you enter are never sent to our server. There are no accounts and no sign-up.

Your browser's local storage keeps your last 20 calculations so you can see your history. Nothing there is sent to us; clearing site data removes it.

We count page views with Cloudflare Web Analytics. It does not set cookies and does not fingerprint your browser. It records things like the page you opened, the referring site, browser type and approximate country.
Fonts are loaded from Google Fonts, so your browser requests font files from Google's servers.
The optional "support" link opens a Stripe payment page. Card details are entered on Stripe's page and are never seen by us; Stripe shares with us only what is needed for the payment, such as the amount and the email you give Stripe.
The site is hosted on Cloudflare, which processes standard request data such as your IP address to deliver and protect the site.

We do not sell data, show ads, or build profiles of visitors.

Questions or requests: [email protected]