Summary: Your data stays in YOUR Google account. We don't store, share, or sell your information.
What Data We Access
Soil Analysis App requests access to Google Sheets to store your agricultural data. Specifically:
- Google Sheets: We access only the specific Google Sheet you connect to the app
- Sheet Contents: Soil sample data, field boundaries, yield data, and app settings
We do NOT access any other Google services, files, or accounts beyond the single Sheet you explicitly connect.
How Your Data Is Used
Your data is used exclusively to provide the soil analysis service:
- Storage: All data is stored in YOUR Google Sheet - you own and control it completely
- Processing: Data is processed locally in your web browser to generate maps, charts, and analysis
- Display: Used to create interactive maps, trend charts, yield correlations, and reports
- Sync: Enables access to your data across multiple devices
Data We DON'T Collect
We want to be completely clear about what we do NOT do:
- We do NOT store your data on our servers - all data stays in your Google account
- We do NOT share your data with third parties
- We do NOT sell your data to anyone
- We do NOT access other Google services (Drive, Gmail, etc.)
- We do NOT track your location beyond what you provide in soil samples
- We do NOT use your data for advertising or marketing
Data Security
Your data is protected by multiple layers of security:
- Google's Security: Your Sheet is protected by Google's enterprise-grade security
- OAuth 2.0: We use Google's secure authentication - we never see your password
- No Server Storage: Since we don't store your data, it can't be breached from our end
- HTTPS: All connections are encrypted
- Local Processing: Analysis happens in your browser, not on external servers
Your Rights
You have complete control over your data:
- Revoke Access: Remove our app's access anytime at myaccount.google.com/permissions
- Delete Data: Delete your Google Sheet to remove all data
- Export Data: Download your Google Sheet anytime as Excel, CSV, or other formats
- Request Information: Email us to ask what data we have access to
Cookies & Local Storage
We use browser localStorage to improve your experience:
- Data Caching: Soil samples and boundaries are cached for faster page loads
- Preferences: Your settings (nutrient visibility, thresholds) are saved locally
- Authentication: Google login tokens are stored temporarily
You can clear localStorage anytime in your browser settings. This won't affect your Google Sheet data.
Third-Party Services
The app uses these third-party services:
- Google Sheets API: For data storage (Google's Privacy Policy)
- OpenStreetMap/Esri: For map tiles (no personal data shared)
- GitHub Pages: For hosting the app (no personal data collected)
Changes to This Policy
We may update this privacy policy from time to time. Changes will be posted on this page with an updated date. Continued use of the app after changes constitutes acceptance of the updated policy.
Last Updated: January 20, 2026