Privacy

ClearCalc performs every calculation locally in your browser. Values you type into a calculator — such as age, sex, or laboratory results — are never transmitted to our servers, never written to the URL, and never stored in cookies or persistent storage.

Calculator inputs are not used for advertising or ad targeting, and no health-related values are shared with any third party.

We use a privacy-respecting analytics tool (Umami) to understand aggregate usage. It records only page views and anonymous interaction events — for example, that a calculation was completed. Analytics events never carry calculator input values or results, and no health numbers are collected.

A service worker caches pages on your device so calculators work offline. This cache contains only page code and assets, never your inputs.