Privacy Policy

Last updated: March 23, 2026

PHC (“Personal Health Companion”, “we”, “our”, or “the app”) is developed by Jackie Chen. This privacy policy explains how we collect, use, and protect your information.

Information We Collect

Apple Health Data. With your permission, PHC reads health metrics from Apple Health including steps, sleep, heart rate, workouts, and other metrics you enable. PHC also writes nutrition data (dietary calories, water intake, and alcohol consumption) back to Apple Health. This data is processed locally on your device and used solely to display your health dashboard and generate insights.

Account Information. When you sign in with Apple, we receive a unique identifier and, optionally, your email address (which Apple may anonymize via Private Relay). We use this solely for authentication.

User-Created Content. Food log entries, water entries, drink entries, books, and reading sessions you create are stored in our cloud database (hosted by Supabase) to enable syncing between your iPhone and Apple Watch. Each record is associated with your user account and protected by row-level security.

Food Photos. When you use the AI food analysis feature, your meal photo is sent to our server for calorie estimation. Photos are processed in real-time and are not stored on our servers after analysis is complete.

AI Insights. When you request weekly insights, aggregated health data (not raw HealthKit samples) is sent to our server for AI analysis. This data is not stored after the insight is generated.

How We Use Your Information

• To display your health metrics on the dashboard
• To sync your data between iPhone and Apple Watch
• To analyze food photos and estimate calories
• To generate personalized weekly health insights
• To authenticate your account

Data Storage and Security

Your data is stored in a secure cloud database with row-level security (RLS) policies that ensure only you can access your own data. Authentication is handled through Sign in with Apple. All data is transmitted over HTTPS.

Data Sharing

We do not sell, rent, or share your personal data with third parties. Your data is only processed by:

• Supabase — cloud database hosting (data storage and authentication)
• Anthropic (Claude) — AI processing for food analysis and health insights (data is not retained after processing)

Data Retention

Your data is retained as long as your account is active. You can delete individual entries at any time within the app. To delete your entire account and all associated data, please contact us.

Your Rights

You have the right to:

• Access your personal data
• Delete individual entries or your entire account
• Revoke Apple Health permissions at any time via iOS Settings
• Sign out and remove local data from your device

Children’s Privacy

PHC is not directed at children under 13. We do not knowingly collect personal information from children.

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.

Contact

If you have questions about this privacy policy, please contact us at:

Email: support@jackiechen.org