Privacy Policy
HorizonScan - Horizon Analysis App for PV Installers
Last updated: January 2026
1. Introduction
HorizonScan ("we", "our", "the app") is a mobile application designed for photovoltaic (PV) installers to measure and analyze horizon lines for shading analysis. We are committed to protecting your privacy and being transparent about the data we collect.
2. Data We Collect
2.1 Location Data
The app requests access to your device's location to:
- Calculate sun path for the specific geographic coordinates
- Enable accurate horizon analysis for solar installations
- Save location metadata with panorama captures
Location data is stored locally on your device and is not transmitted to our servers unless you explicitly opt-in to AI training data sharing.
2.2 Camera and Photos
The app uses your camera to capture panoramic photos for horizon detection. All photos are stored locally on your device.
2.3 Sensor Data
The app uses device sensors (accelerometer, gyroscope, compass) to determine device orientation. This data is processed in real-time and not stored or transmitted.
2.4 AI Training Data (Optional)
If you choose to contribute to AI development, the app may upload:
- Low-resolution panorama thumbnails (360x100 pixels)
- Anonymized location (rounded to ~111km precision)
- Horizon line data you've drawn
You can enable or disable this in Settings at any time.
3. How We Use Your Data
- Local processing: All core functionality works offline on your device
- PDF reports: Generated locally and stored on your device
- AI improvement: Only if you opt-in, anonymized data helps train horizon detection AI
- Analytics: Basic app usage statistics via Firebase Analytics to improve the app
4. Data Storage and Security
- Panoramas and reports are stored in your device's local storage
- Optional cloud backup uses your personal Google Drive (you control access)
- AI training data (if opted-in) is stored securely on Cloudflare R2 servers
- We do not sell or share your data with third parties
5. Your Rights
You have the right to:
- Deny location and camera permissions (core features will be limited)
- Disable AI training data sharing at any time in Settings
- Delete all local data by uninstalling the app
- Request deletion of any AI training data you've contributed
6. Third-Party Services
- Firebase Analytics: Anonymous usage statistics (Firebase Privacy)
- OpenStreetMap: Map tiles for location selection (OSM Privacy)
- Google Drive: Optional backup service (your Google account)
7. Children's Privacy
This app is designed for professional use by PV installers and is not intended for children under 16. We do not knowingly collect data from children.
8. Changes to This Policy
We may update this privacy policy from time to time. We will notify you of any changes by posting the new policy in the app and updating the "Last updated" date.
9. Contact Us
If you have questions about this privacy policy or want to request data deletion:
Email: privacy@gethorizonscan.app