Privacy Policy
Effective Date: February 28, 2026
The Visual Snow Data Project ("we", "us", or "our") is committed to protecting your privacy and ensuring
transparency regarding our data practices. This policy details our approach to sensitive permissions and
user data.
1. Prominent Disclosure: Camera Permission
The Visual Snow application requests access to your device's Camera
(android.permission.CAMERA).
- Purpose: The camera is used solely to provide a real-time, live-video background
for the visual snow simulation overlays. This allows users to visualize how their symptoms appear in
their actual environment.
- Access & Collection: The app accesses the camera stream in real-time. We do
not collect, capture, save, or record any images or video from the camera.
- Usage: The camera data is processed ephemerally on your device for immediate
display purposes only.
- Sharing: No camera data is ever transmitted off the device or shared with any third
parties.
2. Zero-Knowledge Architecture & Health Data
The application operates on a Zero-Knowledge principle, specifically regarding your
Health Data:
- No Personal Data Collection: We do not collect names, email addresses, or any
identifiers.
- No Network Transmission: The app does not request internet permissions and cannot
send data to any server.
- Health Data (Collection & Usage): We collect self-reported health telemetry,
including sleep hours, stress levels, depression/anxiety scores (PHQ-9), and Visual Snow severity
parameters. This data is collected solely to provide you with a personal tracking
diary and simulation preset mechanism.
- Local Storage exactly: All symptom logs, configurations, and notes are stored
strictly in your device's private sandbox storage using local database technologies (e.g., Room
database on Android, UserDefaults on iOS). For a complete list of exactly what data is
collected, please see our Configuration
Guide.
3. Data Safety Summary
| Data Type |
Accessed |
Collected |
Shared |
Purpose |
| Camera |
Yes |
No |
No |
Core App Functionality (Simulation) |
| Symptom Logs |
Yes |
No |
No |
User-controlled tracking |
| Device IDs |
No |
No |
No |
N/A |
4. Data Retention & Deletion
Data Retention Period: Because all data is stored exclusively on your device, your data
is retained indefinitely for as long as you keep the application installed. We do not
maintain any centralized records or backups of your data.
Data Deletion Methods: You have full control over your data. You may delete your data at
any time using one of the following methods:
- In-App Deletion: Open the "About" screen in the app and tap the "Delete All
Data" button. This will instantly erase all logs from the local database.
- Device Settings: Clear the application's storage/cache using your device's OS
settings.
- Uninstallation: Uninstalling the application will permanently and automatically
remove all associated health data from your device.
5. User Responsibility & Data Portability
Data Portability: You may export your logs as PDF or ZIP files using the export tool
inside the app. Once exported, the security and privacy of these files are entirely your responsibility.
5. Contact
For privacy-related inquiries, please visit szpeter.pages.dev.
By using this software, you acknowledge and
agree to this Privacy Policy and the associated Medical Disclaimer.