Privacy Policy

Last updated: March 2026

ThePrimeCalculator ("we," "us," or "our") operates the website ThePrimeCalculator.com (the "Site"). This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you visit our Site. Please read this policy carefully. By using the Site, you agree to the collection and use of information in accordance with this policy.

1. Information We Collect

1.1 Information You Provide

When you sign in to the Site using Google Sign-In (via NextAuth), we receive your name, email address, and profile picture from Google. We use this information solely to authenticate your session and personalize your experience (e.g., displaying your name).

1.2 Information Collected Automatically

When you visit the Site, we may automatically collect certain information about your device and usage, including:

  • Log data: IP address, browser type, operating system, referring URLs, pages visited, and timestamps.
  • Analytics data: We use Google Analytics to understand how visitors interact with the Site. Google Analytics collects data such as pages viewed, time on page, bounce rate, and general geographic location. This data is aggregated and does not personally identify you.
  • Local storage data: We use your browser's localStorage to save your theme preference (light/dark mode) and calculator bookmarks. This data is stored entirely on your device and is never transmitted to our servers.

1.3 Calculator Inputs

All calculations are performed client-side in your browser. We do not collect, store, or transmit the values you enter into any calculator. Your calculation data remains entirely on your device.

2. How We Use Your Information

We use the information we collect for the following purposes:

  • To provide and maintain the Site, including authenticating user sessions via Google Sign-In.
  • To analyze usage trends and improve the Site's performance, functionality, and content.
  • To monitor and prevent technical issues, errors, or abuse.
  • To comply with legal obligations and enforce our Terms of Service.

3. Cookies and Tracking Technologies

The Site uses cookies and similar tracking technologies. For detailed information about the types of cookies we use and how to manage them, please see our Cookie Policy.

In summary, we use essential cookies for authentication sessions and Google Analytics cookies to understand site usage. We do not use advertising or tracking cookies.

4. Third-Party Services

We use the following third-party services that may collect information as described in their respective privacy policies:

5. Data Sharing and Disclosure

We do not sell, trade, or rent your personal information to third parties. We may share information only in the following circumstances:

  • Service providers: With trusted third-party services (listed above) that assist us in operating the Site, subject to their own privacy policies.
  • Legal requirements: When required by law, regulation, legal process, or governmental request.
  • Protection of rights: To protect the rights, property, or safety of ThePrimeCalculator, our users, or the public.

6. Data Security

We implement reasonable technical and organizational measures to protect your information from unauthorized access, alteration, disclosure, or destruction. The Site is served over HTTPS, and authentication tokens are stored in secure, HTTP-only cookies. However, no method of transmission over the internet or method of electronic storage is 100% secure. We cannot guarantee absolute security.

7. Data Retention

We retain your account information (name, email, profile picture) for as long as your account remains active. Analytics data collected by Google Analytics is retained according to Google's data retention settings. Local storage data (theme preferences and bookmarks) persists on your device until you clear your browser data.

8. Your Rights

Depending on your jurisdiction, you may have the following rights regarding your personal information:

  • Access: Request a copy of the personal data we hold about you.
  • Correction: Request correction of inaccurate personal data.
  • Deletion: Request deletion of your personal data.
  • Opt-out: Opt out of Google Analytics tracking by installing the Google Analytics Opt-out Browser Add-on.

To exercise any of these rights, please contact us at contact@theprimecalculator.com.

9. Children's Privacy

The Site is not directed to children under the age of 13. We do not knowingly collect personal information from children under 13. If we become aware that we have collected personal data from a child under 13 without parental consent, we will take steps to remove that information. If you believe your child has provided us with personal information, please contact us at contact@theprimecalculator.com.

10. International Users

If you are visiting the Site from outside the United States, please be aware that your information may be transferred to, stored, and processed in the United States or other countries where our service providers operate. By using the Site, you consent to the transfer of your information to these countries, which may have different data protection laws than your country of residence.

11. Changes to This Privacy Policy

We may update this Privacy Policy from time to time. We will notify you of any changes by posting the new Privacy Policy on this page and updating the "Last updated" date. Your continued use of the Site after any changes constitutes your acceptance of the updated policy.

12. Contact Us

If you have any questions or concerns about this Privacy Policy, please contact us at:

ThePrimeCalculator
Email: contact@theprimecalculator.com
Website: theprimecalculator.com