Privacy Policy - Green Monitor
Effective date: 27 August 2025
Green Monitor analyzes photos entirely on your device. We do not upload your photos or measurement results to our servers.
What we collect
Account (required): Google Sign-In via Firebase Authentication. We receive your Firebase UID and your Google account email (required) and, when available, your Google display name, for in-app identification and subscription entitlement. Signing in is required to access the paywall and use the app.
Single-device enforcement: a random, app-scoped device ID (stored on your device) and heartbeat timestamps in your Firestore user record (e.g., active_device_id, last_seen). This lets us keep one active device per account.
Purchase status: subscription metadata from RevenueCat / Google Play (e.g., trial eligibility, active entitlement, renewal/cancellation state). We never receive your full payment details.
What stays on your device
Photos you capture or select (original images).
Green/gray overlay images are generated temporarily for on-screen preview only and are not saved to your gallery or exported. They may exist briefly in app cache and can be removed when the app clears temporary files or when you clear app data.
Your analysis results. We do not collect them; therefore we do not use them for model training or analytics.
App settings (e.g., green-threshold preference, calibration points).
Files you save to your gallery and any CSVs you choose to email/share.
Each CSV row includes time, green area (% and cm²), height/width (px and cm). User name (Google display name when provided), Email, and Device ID are included for traceability.
Permissions we request & why
Camera — to capture plant photos.
Photos/Media/Storage — to pick from your gallery and to save captured photos and CSV exports. On older Android versions we may request legacy storage permission.
Internet — to sign in with Google, validate subscription status with RevenueCat/Google Play, and enforce single-device access.
Email / share intent (optional) — only when you tap “Email CSV”; we open your mail app with the file attached. We do not read your emails.
How we use your data
To authenticate and authorize your account (Firebase Authentication).
To enforce one active device per account (Firestore device fields).
To provide and validate subscriptions and free trials (RevenueCat + Google Play).
We do not sell your data or use it for advertising.
Data security & retention
All network traffic is encrypted (HTTPS/TLS). Firestore stores only minimal account and device fields linked to your Firebase UID. We retain these while your account or subscription remains active. You can delete this cloud data at any time: Account & Subscription → Delete account. This removes your Firestore user record (including device and entitlement metadata). It does not cancel your Google Play subscription and it does not delete files stored on your device.
Third-party processors
Firebase (Google) — Authentication and Cloud Firestore (account/device metadata).
RevenueCat — Subscription management integrated with Google Play Billing.
Your choices
Using the app requires signing in with a Google account. You can sign out at any time; functionality will be unavailable until you sign in again.
You can manage, pause, or cancel your subscription anytime in Google Play.
Delete your account and cloud data anytime from Account & Subscription → Delete account. This removes your Firestore user record (account/device/subscription metadata). Deleting your account does not cancel your Google Play subscription and does not delete files stored on your device.
Need help? Contact us
Email support:
Manage subscription in Google Play:
https://play.google.com/store/account/subscriptions?package=com.cropmonitor.greenmonitor