Privacy Policy
Last updated: October 2026
The short version
We collect almost nothing. The calculators on this site run entirely in your browser. We do not store your dates, your inputs, or any personal information.
What we collect
Information you provide
We do not have a contact form. If you contact us by email, we receive your email address and the contents of your message. We use this only to respond to you.
Information we collect automatically
We do not use analytics. We do not track visitors. We do not build profiles.
What we do NOT collect
- We do not store your calculator inputs (dates, cycle lengths, etc.)
- We do not use analytics or tracking scripts
- We do not sell, rent, or share any information with third parties for their marketing purposes
Cookies
We use Google AdSense to display advertisements. AdSense may use cookies and similar technologies to serve personalized ads and to measure ad performance. You can control cookies through your browser settings.
We do not set any cookies ourselves. The site functions entirely without first-party cookies.
Third-party links
Our guides may contain links to third-party websites, including affiliate links. When you click an affiliate link, the destination site may collect information about you, including through cookies. We are not responsible for the privacy practices of third-party sites. We encourage you to read their privacy policies.
Data retention
We do not retain any personal information. Calculator inputs are processed in your browser and never transmitted to our servers. If you contact us by email, we retain your message only as long as necessary to respond.
Your rights
If you are in the European Economic Area (EEA), you have the right to access, correct, or delete any personal information we hold about you. You also have the right to object to or restrict our processing of your data. To exercise these rights, please contact us. We will respond within 30 days.
Changes to this policy
We may update this policy from time to time. Changes will be posted on this page with an updated revision date.
Contact
If you have questions about this privacy policy, please contact us.