Privacy Policy

Short version: we do not collect your data. Everything you type into the calculator is processed locally in your browser and never leaves your device.

Data we process

None. The calculator runs entirely in your browser as static files. Dates you enter are used to compute your result on your own device and are not transmitted to us or to any third party. There is no backend database.

Local storage

We use your browser's localStorage for interface preferences only — your selected theme (dark or light) and your sharing watermark preference. This never includes personal data such as dates of birth, and it stays on your device. You can clear it at any time through your browser settings.

Trackers and advertising

This site does not use analytics trackers, advertising pixels, or third-party tracking scripts of any kind.

Changes

If this policy ever changes materially, the updated version will be published on this page.