Privacy Policy

We strictly protect your privacy and pledge not to collect, store, or share your personal health information

Last updated: August 1, 2025

Privacy Protection Commitment

Local Processing

All data is processed locally on your device and never uploaded to our servers

Zero Data Collection

We do not collect any personal health information or identifiable data

Complete Transparency

Open source code, transparent algorithms, no hidden data collection behavior

1. Overview

Heart Age Calculator understands the sensitivity and importance of personal health information. We are committed to adopting the highest standards to protect your privacy. This policy explains how we handle your information.

Core Commitment

We do not collect, store, transmit, or share any of your personal health data. All calculations are completed locally on your device.

2. Information We Do Not Collect

To ensure your privacy, we explicitly state that we do not collect any of the following information:

Health Data

  • Age, gender
  • Blood pressure values
  • Cholesterol levels
  • Medical history
  • Lifestyle information

Personal Information

  • Name, address
  • Phone, email
  • ID numbers
  • Bank account information
  • Any identifiable information

3. Data Processing Methods

Local Computation

When you enter health information on our website, all data is processed locally in your browser. The calculation algorithms run on your device without needing to send data to our servers.

Server Side

Our servers only provide static website files (HTML, CSS, JavaScript). They do not receive, process, or store any user-entered health data.

Data Visibility

Your entered health data is only visible to you, stored in your device's memory, and automatically cleared when the page is refreshed or closed.

4. Website Access Information

Like most websites, our servers may record some basic access information:

Technical information that may be recorded:

  • • IP address (for basic security protection)
  • • Access time and pages
  • • Browser type and version
  • • Device type (desktop/mobile)

Note: This information cannot be associated with your health data because we do not collect your health data at all.

5. Cookies and Tracking

We do not use:

  • ✗ Tracking cookies
  • ✗ Advertising cookies
  • ✗ Analytics cookies
  • ✗ Third-party tracking tools
  • ✗ Google Analytics
  • ✗ Facebook Pixel

Technical Cookies:

We may use minimal necessary technical cookies to ensure the website functions properly, such as remembering your language preferences.

These cookies contain no personal information and can be disabled in browser settings.

6. Third-Party Services

Our website is hosted on Cloudflare Pages, which is a content delivery network service.

Cloudflare Pages:

  • • Only provides website hosting services
  • • Does not receive your health data
  • • May record basic access logs
  • • Follows its own privacy policy

Since all calculations are completed locally, even hosting service providers cannot access your health data.

7. Data Security

Although we don't collect your health data, we still take multiple measures to ensure website security:

Technical Security Measures:

  • HTTPS encrypted transmission
  • Security header configuration
  • Content security policy
  • XSS attack prevention

Architectural Security:

  • Static website, no backend database
  • No user account system
  • Open source code, auditable
  • Regular security updates

8. Your Rights

Since we don't collect your personal data, the following rights are naturally guaranteed:

Automatically Guaranteed Rights:

  • ✓ Data control: All data remains on your device
  • ✓ Right to deletion: Automatically deleted when closing page
  • ✓ Data portability: Data never leaves your device
  • ✓ Right to information: This policy details our practices

9. Policy Changes

We may update this privacy policy from time to time. Any significant changes will be notified prominently on the website. We pledge not to reduce privacy protection standards without appropriate notice. Continued use of the service constitutes acceptance of the updated policy.

10. Contact Us

If you have any questions or concerns about this privacy policy, please feel free to contact us:

We value your privacy rights and take every privacy-related inquiry seriously.

Update History

August 1, 2025 - First release of Privacy Policy