Privacy Policy

Short version: your numbers never leave your browser. All calculations run locally in JavaScript, and we do not transmit, store, or sell anything you type.

We store two small preferences in your browser's local storage: your chosen language and light/dark theme. These never leave your device and you can clear them at any time from your browser settings.

If analytics are enabled, they are aggregate and privacy-friendly: we count events like “a calculation was completed” without collecting the values involved or any personal identifiers.