Privacy Policy

Last updated: June 6, 2026

Our Core Principle

We collect as little data as possible. We don't want your personal information, your health data, your email address, or your browsing history. This site is designed to work without any of that.

What We Don't Collect

  • Personal information: We don't ask for your name, email, address, phone number, or any identifying information.
  • Health data: Your BMI, weight, body fat percentage, calorie targets, and any other inputs you enter into our tools are processed entirely in your browser. They never leave your device.
  • Account data: We don't have user accounts, login systems, or registration forms.
  • Payment data: We don't sell anything directly, so we never process credit cards or payment information.

What We Do Collect (Minimal)

The only data we potentially have access to is:

  • Server logs: Our hosting provider (GitHub Pages) may collect basic server logs including your IP address, browser type, and pages visited. This is standard for all websites and is not under our direct control.
  • Advertising data: If you see ads on this site, the ad network may use cookies or similar technologies to serve relevant ads. You can opt out of personalized advertising through your browser settings or by visiting YourAdChoices.

Local Storage (Your Browser Only)

Some of our tools use your browser's localStorage feature to save your calculation history (e.g., past BMI entries, weight logs). This data:

  • Is stored only on your device
  • Is never transmitted to our servers
  • Can be cleared at any time by clearing your browser data
  • Is not accessible to us or any third party

Cookies

We do not use cookies for tracking, analytics, or personalization. Third-party advertisers may use cookies as described above.

Third-Party Links

Our articles may contain links to external websites (e.g., PubMed, CDC, product pages). We are not responsible for the privacy practices of these third-party sites. We encourage you to read their privacy policies.

Children's Privacy

This site is not intended for children under 13. We do not knowingly collect any information from children under 13.

Changes to This Policy

We may update this privacy policy from time to time. Changes will be posted on this page with an updated date. Since we don't have your email, we can't notify you directly — please check this page periodically.

Contact

If you have questions about this privacy policy, email us at privacy@bmitool.org.