1. Information We Do Not Collect

Period Calculator is committed to user privacy. We do not collect, transmit, or store any of your personal health data on our servers. All dates, cycle lengths, and symptom logs inputted into our tool pages are processed entirely offline directly in your browser using local storage (`localStorage`). You retain 100% control over this data, and it is never seen or accessed by our team.

2. Google AdSense and Advertising Cookies

We use Google AdSense to display advertisements to our users to keep this tool free. Please be aware of the following third-party policies mandated by Google:

• Third party vendors, including Google, use cookies to serve ads based on a user's prior visits to your website or other websites.
• Google's use of advertising cookies enables it and its partners to serve ads to our users based on their visit to our site and/or other sites on the Internet.
• Users may opt out of personalized advertising at any time by visiting Google Ads Settings.

3. Third-Party Ad Networks

In addition to Google, we may partner with other third-party ad networks. These vendors may also use cookies or web beacons to retrieve non-personally identifiable information (such as your browser type or the date and time of your visit) to serve ads of relevance to you. If you have not opted out of third-party ad serving, the cookies of other third-party vendors or ad networks may also be used to serve ads on our site. You can opt out of some third-party vendor's use of cookies for personalized advertising by visiting www.aboutads.info.

4. Changes to This Policy

We may update this Privacy Policy periodically. We will notify you of any changes by posting the new Privacy Policy on this page. By continuing to use Period Calculator, you acknowledge and agree to these terms.