Privacy Policy

The Short Version

All calculations happen entirely in your browser. We do not collect, store, transmit, or share any personal information or health data you enter into the calculators.

1. Information We Do Not Collect

GrowthPercentile.com is a client-side application. When you enter your child's weight, height, age, or sex into any calculator:

• The data stays in your browser
• No data is sent to any server
• No data is stored in any database
• No data is shared with any third party

We do not collect names, email addresses, IP addresses for tracking purposes, or any Protected Health Information (PHI) as defined by HIPAA.

2. Local Storage

The Site uses your browser's localStorage feature to store a simple visit counter. This is used solely to display a "visits" count on the page. The visit counter:

• Contains no personal information
• Contains no health or measurement data
• Never leaves your browser
• Can be cleared at any time by clearing your browser data or using your browser's developer tools

No cookies are set by the Site itself.

3. Third-Party Services

Hosting

The Site is hosted on Cloudflare Pages. Cloudflare may collect standard web server logs (IP address, browser type, pages visited, timestamps) as part of its infrastructure. This data is governed by Cloudflare's Privacy Policy.

CDN Resources

The Site loads the Chart.js library from a CDN (cdnjs.cloudflare.com). This request is subject to Cloudflare's Privacy Policy.

Analytics

If analytics are added in the future, this policy will be updated to disclose the specific service used, what data is collected, and how to opt out. As of the last updated date above, no analytics service is active.

4. Children's Privacy

The Site is designed for use by parents, caregivers, and healthcare professionals — not by children directly. We do not knowingly collect personal information from children under 13 (or under 16 in the EEA). Since no personal data is collected from any user, this concern does not arise in practice.

5. Data Security

Because no personal or health data is transmitted to or stored on our servers, there is no server-side data to secure. The Site is served over HTTPS to protect the integrity of the page content delivered to your browser.

6. Your Rights

Under GDPR, CCPA, and similar privacy regulations, you have the right to access, correct, delete, and port your personal data. Since we do not collect or store any personal data, there is nothing to access, correct, delete, or port. The only locally stored data (visit counter) is under your full control in your browser.

7. 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. If we begin collecting any personal data in the future, this policy will be updated before any collection begins.

8. Contact

If you have questions about this Privacy Policy, please contact us at [email protected].