Privacy Policy

1. Information We Don't Collect

Duchenne Smile Coach is designed with privacy at its core. The following data never leaves your device:

• Camera feed — Your camera stream is processed in real-time on-device using Apple's Vision framework. It is never recorded, stored, or transmitted.
• Photos and snapshots — Smile snapshots captured during training are stored locally on your device only.
• Facial analysis data — Smile scores, eye crinkle measurements, mouth lift data, and symmetry calculations are computed and stored entirely on your device.
• Personal information — We do not collect your name, email address, or any personally identifiable information through the app.

2. On-Device Processing

All smile analysis is performed using Apple's Vision framework, which runs entirely on your device. This means:

• No internet connection is required for smile analysis
• No images or video frames are sent to any server
• No third-party AI or machine learning services are used
• Processing speed depends only on your device's capabilities

3. Data Stored on Your Device

The app stores the following data locally on your device:

• Training history — Your smile scores, challenge completions, streak data, and training statistics
• Gallery photos — Smile snapshots captured at peak scores during training sessions
• Achievements — Your unlocked achievements and progress
• Events — Event names and dates you create for event preparation training
• Calibration data — Your neutral face baseline used for accurate scoring
• App preferences — Settings such as sound effects and notification preferences

4. iCloud Backup (Premium)

If you enable iCloud Backup (a Premium feature), your app data is synced to your personal iCloud account using Apple's CloudKit infrastructure. This means:

• Data is encrypted in transit and at rest using Apple's security standards
• Only you can access your backed-up data through your Apple ID
• We cannot access, read, or decrypt your iCloud data
• You can disable iCloud Backup at any time in the app settings

5. Third-Party Services

Apple App Store

If you purchase a Premium subscription, the transaction is handled entirely by Apple through the App Store. We receive a confirmation of your subscription status but do not have access to your payment details. Please refer to Apple's Privacy Policy for details on how Apple handles purchase data.

Advertising (Free Tier)

The free version of Duchenne Smile Coach displays banner advertisements. These ads are served through Apple's advertising framework. We do not share any personal data with advertisers. You can limit ad tracking through your device's privacy settings.

6. Analytics and Tracking

Duchenne Smile Coach does not use any third-party analytics services, tracking pixels, or data collection tools. We do not track your usage patterns, and we do not build user profiles.

7. Notifications

If you grant notification permission, the app sends local notifications to remind you about your daily training streak. These notifications are generated entirely on your device and are not sent through any external push notification service. You can disable notifications at any time in your device's Settings.

8. Children's Privacy

Duchenne Smile Coach is not directed at children under the age of 13. We do not knowingly collect any information from children. The app does not require account creation or any personal information to use.

9. Data Deletion

Since all data is stored on your device, you have full control over it:

• Delete individual photos from the Gallery within the app
• Reset calibration data from the Profile screen
• Delete all app data by deleting the app from your device
• Delete iCloud data by disabling iCloud Backup in the app, then managing storage in your device's iCloud settings

10. Changes to This Policy

We may update this Privacy Policy from time to time. Any changes will be reflected on this page with an updated "Last updated" date. We encourage you to review this policy periodically.

11. Contact Us

If you have any questions about this Privacy Policy or the app's privacy practices, please contact us at:

[email protected]