Cookie Policy

Last Updated:

Last Updated: October 1, 2026

At Period Calculator (this website), we prioritize your privacy and transparency. This Cookie Policy explains our policy regarding cookies and local browser storage technologies.

1. What Are Cookies?

Cookies are small text files placed on your computer or mobile device by websites that you visit. They are commonly used by modern websites to remember user preferences, maintain active login sessions, track navigation patterns across pages, and serve targeted behavioral advertising.

This website does not set, read, or store any cookies on your device.

  • No Tracking or Analytics Cookies: We do not use third-party analytics platforms (such as Google Analytics or Meta Pixel) that install tracking cookies or persistent identifiers.
  • No Advertising Cookies: We do not display advertising banners, behavioral remarketing cookies, or commercial affiliate trackers.
  • No Essential or Session Cookies: Because this website operates entirely without user accounts, user authentication, or server-side shopping carts, we do not require functional session cookies.

3. Local Storage and Client-Side Computation

All calculations—including menstrual period predictions, ovulation dates, fertile windows, and due date estimates—are executed 100% locally within your device’s web browser using client-side JavaScript.

  • We do not write to localStorage, sessionStorage, or IndexedDB.
  • When you reload, navigate away, or close your browser tab, all numbers and dates you entered are immediately and permanently erased from your browser’s temporary working memory.

4. Web Server Logs

When you request web pages, static stylesheets, or SVG icons, our static hosting infrastructure automatically processes standard, temporary HTTP web server logs (such as request timestamps, requested file URLs, browser user agents, and IP addresses). These logs are utilized exclusively to protect network security, prevent DDoS attacks, and ensure reliable hosting delivery. These technical server logs do not use cookies and are never connected to your calculator inputs.

Our educational guides and references may contain links to external medical and governmental institutions (such as ACOG, NHS, WHO, or PubMed). Once you click an outbound link to navigate away from this website, the cookie and privacy policies of those external websites govern your visit. We encourage you to review their policies.

6. Managing and Disabling Cookies in Your Browser

Because this website sets no cookies, you do not need to configure cookie consent banners or opt-out settings to browse our tools privately. However, if you wish to block cookies across the wider internet, you can adjust settings in your browser:

  • Google Chrome: Settings → Privacy and Security → Third-party cookies
  • Mozilla Firefox: Settings → Privacy & Security → Enhanced Tracking Protection
  • Apple Safari: Settings → Privacy → Block all cookies
  • Microsoft Edge: Settings → Cookies and site permissions → Manage and delete cookies

7. Policy Revisions and Contact

If we ever introduce essential functional features that require browser cookies in the future, we will update this Cookie Policy with clear disclosures before implementation and present a compliant consent mechanism.

If you have questions about our cookie policy, please contact us at infosemakanstr@gmail.com.