Privacy policy

Last updated: July 2026

KibbleMath is designed to know as little about you as possible. This page explains, in plain language, what that means in practice.

Who is responsible

The data controller for this website is Patrik Prochazka, Czech Republic. Contact: hello@kibblemath.com.

Your calculator inputs stay on your device

There are no accounts and no forms that submit data to us. Everything you type into a calculator — weights, ages, dates — is processed entirely in your browser and is never sent to our servers or stored by us.

Analytics without cookies

To understand which tools are useful, we use privacy-friendly, cookieless analytics (Cloudflare Web Analytics). It gives us aggregate counts — such as page views and country-level totals — without cookies, without cross-site tracking, and without building individual profiles. Because no cookies or personal identifiers are used, no consent banner is required.

Technical logs

Like virtually every website, our hosting/CDN provider briefly processes IP addresses in server logs to deliver pages and defend against abuse (legitimate interest under Art. 6(1)(f) GDPR). We do not access or use these logs to identify visitors.

Fonts

Pages load typefaces from Google Fonts, which means your browser requests font files from Google's servers and your IP address is processed by Google to deliver them. No cookies are set by this service.

Outbound and affiliate links

Some links may lead to external sites, and in future some product links may be affiliate links (see our disclosure). External sites have their own privacy policies and may set their own cookies once you're there — we have no control over that.

Your rights

Under the GDPR you have rights of access, rectification, erasure, restriction, portability and objection. Since we hold no personal data about visitors, there is usually nothing to act on — but you can always write to hello@kibblemath.com, and you have the right to lodge a complaint with the Czech Office for Personal Data Protection (ÚOOÚ, uoou.gov.cz).

Changes

If we ever add features that change what's collected (for example a newsletter), this policy will be updated first and the date above will change.