Privacy Policy for HealthLens

Last Updated: November 24, 2025

Thank you for using HealthLens ("we," "us," or "our"). This Privacy Policy explains how we collect, use, protect, and handle your information when you use our biological age tracking application and website located at https://health-lens.top (collectively, the "Service").

By using the Service, you agree to the terms of this Privacy Policy. If you do not agree with these practices, please do not use the Service.

1. Our Privacy-First Approach

HealthLens is built with privacy as a core principle. We believe your health data is personal and should remain under your control. All sensitive health data processing happens on your device, not on our servers.

2. Information We Collect

2.1 Health Data (Stored Locally on Your Device)

The following health information never leaves your device:

• Sleep data (hours, quality, patterns)
• Physical activity data (steps, active calories, movement)
• Heart rate and Heart Rate Variability (HRV)
• Meal photos and nutrition information from AI scanning
• Daily biological age calculations
• Personalized health insights

All this data is stored securely in Apple Health on your device and processed using on-device AI. HealthLens accesses this data through Apple's HealthKit framework, which requires your explicit permission.

2.2 Account Information

To provide the Service, we collect:

• Name: To personalize your experience
• Email address: For account authentication, order confirmations, and important updates
• Payment information: Processed securely by Stripe (our payment processor). We do not store your payment details on our servers.

2.3 Optional Public Profile Data (Opt-In Only)

If you choose to participate in community features, we collect anonymized data:

• Leaderboard statistics (anonymized biological age improvements)
• Achievement badges and streaks
• Public profile information (only if you enable sharing)

You can opt out of all community features at any time, and your health data will remain completely private.

2.4 Non-Personal Data

We use web cookies and similar technologies to:

• Maintain your login session
• Remember your preferences
• Analyze website traffic and usage patterns
• Improve our services and user experience

3. How We Use Your Information

We use your information to:

• Provide and improve the HealthLens Service
• Process your one-time payment and manage your subscription to premium add-ons
• Send you important notifications (morning summaries, daily experiments, bedtime reminders)
• Provide customer support
• Communicate product updates and features
• Enable optional community features (leaderboards, challenges) with your consent

4. On-Device Processing

HealthLens uses advanced machine learning models that run entirely on your device to:

• Recognize food and estimate nutrition from meal photos
• Calculate your daily biological age
• Generate personalized health insights and recommendations
• Analyze patterns in your health data

Your meal photos and health calculations never touch our servers.

5. Data Sharing and Third Parties

We do not sell, trade, or rent your personal information to third parties. We share data only as follows:

• Payment Processing: Stripe processes payments securely. See Stripe's privacy policy at https://stripe.com/privacy
• Email Services: Resend handles transactional emails (magic links, notifications). See Resend's privacy policy at https://resend.com/legal/privacy-policy
• Apple Health: Your health data is stored in Apple Health and follows Apple's strict privacy standards
• Community Features: Only if you opt in, anonymized statistics may be displayed on public leaderboards

6. Data Security

We implement industry-standard security measures:

• All data transmissions are encrypted using HTTPS
• Payment information is processed through PCI-compliant Stripe
• Health data remains encrypted in Apple Health on your device
• On-device AI processing ensures sensitive data never leaves your device
• We use secure authentication through NextAuth with Google OAuth and magic links

7. Your Data Rights

You have the right to:

• Access your account information at any time
• Update or correct your personal information
• Delete your account and associated data
• Opt out of non-essential emails
• Opt out of community features while keeping core functionality
• Request a copy of your data
• Revoke HealthLens's access to Apple Health at any time through iOS Settings

To exercise these rights, contact us at bartzalewskidev@gmail.com

8. Data Retention

• Account information: Retained while your account is active
• Health data: Stored locally in Apple Health, under your control
• Payment records: Retained as required by law for tax and accounting purposes
• Deleted accounts: Data is permanently deleted within 30 days of account deletion

9. Children's Privacy

HealthLens is not intended for children under 13. We do not knowingly collect personal information from children. If you are a parent or guardian and believe your child has provided us with personal information, please contact us immediately.

10. Apple Health and HealthKit

HealthLens integrates with Apple Health using HealthKit. We access only the health data types you explicitly authorize. This data:

• Remains stored in Apple Health
• Is accessed only when the app is in use
• Is never sent to our servers
• Can be revoked at any time through iOS Settings
• Follows Apple's HealthKit privacy requirements

We will never use or disclose to third parties health information from HealthKit for advertising or similar services, or sell it to data brokers.

11. Multi-Platform Access

HealthLens is available on iPhone, iPad, Mac, Apple Watch, and Apple TV. Your health data syncs across your devices through Apple Health, maintaining the same privacy protections on all platforms.

12. International Users

Your information may be transferred to and processed in countries other than your own. We ensure appropriate safeguards are in place to protect your data in accordance with this Privacy Policy.

13. Updates to This Privacy Policy

We may update this Privacy Policy to reflect changes in our practices or legal requirements. We will notify you of significant changes via email. Continued use of the Service after changes constitutes acceptance of the updated policy.

14. Contact Us

For questions, concerns, or requests about this Privacy Policy or your data:

Email: bartzalewskidev@gmail.com
Website: https://health-lens.top

By using HealthLens, you acknowledge that you have read and understood this Privacy Policy and agree to its terms.