This Privacy Policy explains how InterestCal ("we", "us", or "our") collects, uses, and protects information when you use our website at interestcal.com.

1. Information We Collect

InterestCal does not require you to create an account or provide any personal information to use our calculators. We collect only the following data:

  • Usage data — page views, session duration, and general navigation patterns, collected automatically by Google Analytics.
  • Calculator inputs — numbers you enter in our calculators are processed entirely in your browser and are never sent to our servers.
  • Cookies — our analytics and advertising partners (Google) may set cookies to measure traffic and serve relevant advertisements.

2. Google Analytics

We use Google Analytics to understand how visitors use our site. Google Analytics collects anonymized data about your visit including pages viewed, time on site, and approximate geographic location derived from your IP address. This data is processed by Google under their own Privacy Policy.

You can opt out of Google Analytics by installing the Google Analytics Opt-out Browser Add-on.

3. Google AdSense

We use Google AdSense to display advertisements on our site. Google may use cookies and similar technologies to serve ads based on your prior visits to our website or other websites. You can opt out of personalized advertising by visiting Google's Ad Settings.

For more information about how Google uses data when you use our site, visit How Google uses data when you use our partners' sites or apps.

4. How We Use Your Information

  • To understand site usage and improve our calculators and content
  • To display relevant advertisements via Google AdSense
  • To monitor site performance and diagnose technical issues

5. Third-Party Services

Our site uses the following third-party services, each governed by their own privacy policies:

6. Cookies

We use cookies for analytics and advertising purposes as described above. Most browsers allow you to control cookies through their settings. Disabling cookies may affect the functionality of some features.

7. Children's Privacy

InterestCal is not directed at children under the age of 13. We do not knowingly collect personal information from children. If you believe we have inadvertently collected information from a child, please contact us at hello@interestcal.com.

8. Changes to This Policy

We may update this Privacy Policy from time to time. Changes will be posted on this page with an updated "Last updated" date.

9. Contact

If you have any questions about this Privacy Policy, please contact us at hello@interestcal.com.