Title: Privacy Policy for PrismEffective Date: January 25, 2026

1. Introduction Prism ("we," "our," or "the App") values your privacy. This policy explains how we handle your data. Prism is a utility app designed to track sunlight exposure and estimate Vitamin D conversion without compromising your personal identity.

2. No Personal Data Collection We do not require you to create an account or log in. We do not collect, store, or transfer your name, email address, phone number, or any other personally identifiable information to our servers.

3. HealthKit Integration To function correctly, Prism requests access to Apple HealthKit:

• Reading Data: We read "Time in Daylight" data collected by your Apple Watch to visualize your daily progress.
• Writing Data: We may write estimated "Vitamin D" data to HealthKit based on our algorithms.
• Privacy Commitment: Your Health data is stored locally on your device or synced via your personal iCloud. We do not use your Health data for advertising, marketing, or data mining purposes.

4. Location Services Prism requests access to your location ("While Using the App") to:

• Fetch the local real-time UV Index.
• Calculate precise sunrise and sunset times for your area.
• Privacy Commitment: Your location data is processed locally. We do not track your movements or store your location history.

5. Data Storage All app data (including your skin settings, history logs, and membership status) is stored locally on your device and synced via Apple's iCloud/CloudKit. We do not operate a separate server to store user data.

6. In-App Purchases Subscriptions are processed securely by Apple via StoreKit. We do not have access to your credit card information or billing details.

7. Changes to This Policy We may update our Privacy Policy from time to time. Any changes will be posted on this page.

8. Contact Us If you have any questions about this Privacy Policy, please contact us at:

• Email: [[email protected]]