LidTrack Privacy Policy
Effective date: August 20, 2026
LidTrack does not require an account and does not upload eye images or measurement records to the developer's servers. Unless you choose to export them, these materials remain on your device.
1. Data Collection
LidTrack does not require account registration and does not collect your name, email address, phone number, location, device identifiers, or other personally identifiable information.
LidTrack contains no advertising services and does not use user data for advertising, cross-app tracking, or user profiling.
2. Face and Eye Data
LidTrack accesses the camera only when you actively use the capture feature. A photo may contain the eye area and surrounding facial features. LidTrack uses the photo only for on-device eye-area detection, size comparison, annotation, and change tracking.
Eye-area detection uses Apple's Vision framework built into iOS. Vision processing takes place entirely on the user's device. LidTrack does not use a cloud-based or third-party AI service and does not transmit photos, face data, eye data, measurements, or analysis results to Apple, the developer, or any third party for processing.
LidTrack does not perform facial recognition, identify individuals, create faceprints or biometric identifiers, or use face or eye data for authentication, advertising, tracking, profiling, or identification.
The developer does not collect, receive, view, or have access to the user's photos, face data, eye data, measurements, or analysis results.
3. Local Storage, Retention, and Deletion
Eye images, measurement results, annotations, and tracking records are stored in the app's local storage on your device. They are retained until you delete the relevant records within the app or uninstall LidTrack. The developer cannot access or remotely delete this locally stored data.
Uninstalling LidTrack will generally remove locally stored app data. Files you exported yourself and backups managed by the operating system are not affected.
4. PDF Reports and User-Initiated Export
LidTrack can generate PDF reports on your device from locally stored records. A report may include records, statistics, and images that you choose to include. PDF generation takes place entirely on your device.
You choose whether to save PDFs, images, or records locally on your device, to your own iCloud Drive, or to another destination through Apple's system share features. LidTrack does not automatically upload or transmit these files.
Exports are initiated by you. Exported files are not sent to the LidTrack developer, and the developer cannot access them. iCloud is provided by Apple. If you choose another app or service as the export destination, subsequent processing is governed by that service's privacy policy and your settings.
5. Third-Party Services and AI Processing
The LidTrack app does not use cloud-based or third-party AI services to process user data. No third party receives or processes the user's photos, face data, eye data, measurements, or tracking records.
The LidTrack app does not use third-party advertising, cross-app tracking, or user analytics services.
Apple may process information relating to App Store distribution, system diagnostics, backups, or iCloud under its own policies. This information is not directly collected or controlled by the LidTrack developer.
The official LidTrack website uses Cloudflare Web Analytics to understand aggregate website traffic trends. This website analytics service does not use cookies and is not used to identify or track individual visitors. It applies only to the website and does not access or analyze photos, measurements, or records in the LidTrack app.
6. Medical Disclaimer
LidTrack is intended only to help users record and observe visible eyelid changes. It is not intended to diagnose, treat, or prevent any disease and is not a substitute for professional medical advice.
Comparison results may be affected by camera distance, angle, lighting, and image quality. If symptoms persist or worsen, or if you experience pain or changes in vision, promptly consult a qualified healthcare professional.
7. Children's Privacy
LidTrack does not knowingly collect personal information from children or other users. Children should use the app with appropriate guidance from a parent or guardian.
8. Changes to This Policy
If LidTrack's features or data practices change, this Privacy Policy may be updated. The revised policy will be published on this page with a new effective date.
9. Contact
If you have questions about this Privacy Policy, contact the LidTrack developer at: