Privacy Policy

Last updated: April 27, 2026

Your Data Stays on Your Device

All calculations are performed entirely in your browser. We do not collect, store, or transmit any health or cycle data you enter into the calculator. Your dates, cycle lengths, and results never leave your device.

Analytics

We use analytics to understand how visitors use this site. Analytics data is aggregated and not personally identifiable.

Advertising

We may display ads through Google AdSense. Google may use cookies to serve ads based on your prior visits to our site or other sites.

Cookies

This site uses cookies for analytics and advertising purposes. You can opt out by adjusting your browser settings.

Contact

For privacy questions, contact us at the site email address.