Privacy Policy
SuperFontan · Last updated September 2026
SuperFontan helps people living with Fontan circulation track health metrics and training. This policy explains what data the app handles and how.
1. Data stays on your device by default
Your health metrics, medications, lab results and conditions are read from Apple Health / Apple Health Records (iOS) or Google Health Connect (Android) with your explicit permission, and are processed on your device. Anything you enter manually is stored locally on your device. We do not operate a server that stores your health data.
2. HealthKit / Health Connect data
The app only reads the health data types you approve. This data is used to display your trends and compute your on-device prognosis. It is never used for advertising and is never sold. In line with Apple and Google policies, health data obtained from HealthKit / Health Connect is not shared with third parties.
3. AI Prognosis (Premium)
The free prognosis is generated entirely on your device. If you subscribe to Premium and AI Prognosis is enabled, a summary of the relevant metrics (not your full record) is sent over an encrypted connection to our processing service and to Anthropic (the Claude API) solely to generate your summary, then discarded. You can use the app fully without this feature.
4. Sharing exports
When you tap “Export”, you choose where to send the summary (email, Files, etc.). That action is initiated by you; the app does not transmit exports on its own.
5. Subscriptions
Purchases are processed by the Apple App Store / Google Play. We receive confirmation of your subscription status but not your payment details.
6. Analytics
The app does not include third-party advertising or tracking SDKs.
7. Your choices
You can revoke health permissions at any time in the system Health / Health Connect settings, delete manually entered data in the app, and cancel your subscription in your App Store / Google Play account.
8. Not medical advice
SuperFontan is informational only and is not a medical device.