Privacy Policy for Graves and Thyroid Eye Disease

Effective Date: [Date, e.g., October 26, 2023]

Welcome to Graves and Thyroid Eye Disease. Your privacy is important to us. This Privacy Policy explains how we handle information when you use our application.

Information We Collect

Our application is designed with your privacy in mind. We collect the following types of information solely for the functioning of the app on your device:

• 3D Scan Data: When you initiate a scan, the app uses the LiDAR sensor and camera to capture depth and image data of the face. This data is processed directly on your device to create a 3D model.
• Measurement Data: Calculations derived from the 3D models, such as pupillary distance (if measured in-app), base distance, and eye protrusion values, are generated and stored when you perform measurements.
• User-Entered Information (Optional): You may optionally enter patient identifiers like Name, Date of Birth, or Medical Record Number (MRN) to associate with measurements.
• Purchase Information (Handled by Apple): If you purchase a subscription or lifetime access, Apple's standard StoreKit process handles the transaction. We receive anonymized transaction data (like purchase date or subscription status) to verify your entitlement but do not receive or store your payment details.

We do not collect analytics, usage statistics, or any other personal information automatically.

How We Use Information

The information collected is used exclusively for the following purposes within the app, directly on your device:

• To generate 3D facial models from scan data.
• To perform ocular protrusion and related measurements based on your input on the 3D model.
• To calibrate measurements using the provided pupillary distance.
• To display your measurement history within the app.
• To optionally associate measurements with the patient information you enter.
• To verify purchase status (lifetime or subscription) via StoreKit to unlock features.
• To generate composite images containing scan views and measurement data *if you use the save/share feature*.

Your data is processed locally and is not used for advertising, tracking, or any purpose other than the core functionality described.

Data Storage

All scan data, 3D models, measurement results, and any user-entered patient information are stored exclusively locally on your device.

• Scan session data (raw images, models) is stored in the app's container within the Files app ("On My iPhone/Graves and Thyroid Eye Disease"). You have direct access to this data via the Files app.
• Measurement history and user-entered patient details (Name, DOB, MRN, Notes) are stored locally using standard iOS storage mechanisms (like UserDefaults or local files within the app's protected container).

• Limited Device Functionality

  • The TrueDepth API is used solely for calculating the distance between the user's face and the device

  • This functionality operates entirely on-device

  • No face scanning data is ever stored or transmitted

  • All calculations are performed in real-time and immediately discarded unless saved locally by the user

No scan data, measurement results, or user-entered patient information is transmitted or stored on any external servers by us.

Data Sharing

We do not share your scan data, measurement results, or user-entered patient information with any third parties.

• You, the user, have the option to manually share generated 3D models (.usdz files), measurement history (via CSV/Text export if you re-enable it), or saved composite images using the standard iOS sharing features. This sharing is entirely under your control.
• Anonymized purchase transaction data is handled by Apple as part of the App Store process.

Your Control and Data Deletion

• You can delete scan folders, 3D models, and raw images directly using the iOS Files app.
• You can delete individual measurement records from the history view within the app using the swipe-to-delete feature.
• You can clear all measurement history using the "Delete All" option within the history view.
• You can clear user-entered patient details (Name, DOB, MRN, Notes) within the Patient Information section of the app.
• Deleting the application from your device will remove all locally stored measurement history and associated user-entered details stored within the app's container (unless stored in the Files app directory, which persists until manually deleted).

Security

We rely on the security features provided by the iOS operating system to protect the data stored locally on your device. As data is not transmitted to external servers by the app, the primary security rests with the security of your device itself.

Children's Privacy

Our application is not intended for use by children under the age of 13. We do not knowingly collect any information from children under 13.

Changes to This Privacy Policy

We may update our Privacy Policy from time to time. We will notify you of any changes by posting the new Privacy Policy on this page. You are advised to review this Privacy Policy periodically for any changes.

Contact Us

If you have any questions about this Privacy Policy, please contact us:

By email: mullman@gmail.com