Privacy Policy & Data Safety
Official Data Safety and Privacy Disclosures for HydroGrow - Smart Hydroponics Manager.
1. Core Architecture: 100% Offline & Zero Data Collection
HydroGrow ("the Application", package identifier com.h3dapps.hydrogrow) is designed on an uncompromising Offline-First privacy architecture. All your grow cycles, plant profiles, reservoir measurements (pH, EC, PPM, water levels, temperatures), daily photo journals, and nutrient recipes remain exclusively on your local device within the application's private SQLite sandbox.
The Application operates no tracking servers, collects no analytics telemetry, embeds no advertising networks, and never sells, rents, or transmits your personal information to third parties.
2. Android Device Permissions & Explicit Purposes
The Application requests only standard Android permissions strictly necessary for user-initiated core features:
- Camera (
android.permission.CAMERA): Used solely when you choose to take a photo of your plants, root systems, or harvest directly in your local journal. Photos are stored securely in local app storage. - Photo Library (
android.permission.READ_MEDIA_IMAGES): Requested only when you choose to import an existing photo from your device's photo gallery into a plant log entry. - Notifications (
android.permission.POST_NOTIFICATIONS): Used to schedule local, on-device reminder alerts for routine water changes and solution health warnings. No remote push notification servers are used. - Reboot Handling (
android.permission.RECEIVE_BOOT_COMPLETED): Permits the Application to automatically re-register your scheduled local water change and reservoir check reminders whenever your device restarts. - Vibration (
android.permission.VIBRATE): Provides tactile vibration feedback for button taps and alarm signals. - In-App Purchases (
com.android.vending.BILLING): Used to process purchases and subscriptions through Google Play Billing. Payment card and banking details are processed exclusively by Google Play. - Network Access (
android.permission.INTERNET&ACCESS_NETWORK_STATE): Used exclusively for two user-directed operations: (1) Google Play license verification for PRO features, and (2) Optional, user-initiated backup uploads and downloads to your personal Google Drive via direct encrypted HTTPS (TLS 1.3).
3. Google Drive Cloud Backup (Optional User Feature)
The Application includes an optional, user-initiated cloud backup feature powered by the official Google Drive API:
- OAuth 2.0 Scope: The Application requests exclusively the
https://www.googleapis.com/auth/drive.filescope. - Restricted Access: Under this permission, HydroGrow can ONLY access, create, read, and delete files that HydroGrow itself created within its dedicated
HydroGrow Backupsfolder on your Google Drive. - No Access to Personal Drive Files: The Application has zero access to your personal documents, photos, or any other existing folders on your Google Drive.
- Direct Secure Transfer: Backup packages (
.hydro) are transmitted directly between your Android device and official Google APIs using encrypted HTTPS (TLS 1.3). No intermediary proxy servers are involved. - Google API Services User Data Policy: HydroGrow adheres to the Google API Services User Data Policy, including the Limited Use requirements.
- Disconnection & Token Revocation: You can disconnect your Google account at any time in the Application's Backup Center, which immediately removes all access tokens from the local device.
4. Google Play Data Safety Summary Matrix
In accordance with Google Play's Data Safety declaration requirements, the following table summarizes all data types and handling practices:
| Data Category | Collected? | Shared? | Processed / Stored | User Deletion |
|---|---|---|---|---|
| Personal Info (Name, Email, Phone, Address) | NO | NO | Not collected | N/A |
| Location Data (GPS / Network) | NO | NO | Not collected | N/A |
| Financial Info (Credit card, Bank accounts) | NO | NO | Processed solely by Google Play Billing | Google Play account |
| Photos & Images (Plant / journal photos) | OPTIONAL | NO | Stored 100% locally on device | In-app delete / Reset |
| App Activity & Telemetry (Analytics, crashes) | NO | NO | No third-party trackers or SDKs | N/A |
| Cultivation & Sensor Data (pH, EC, logs) | LOCAL ONLY | NO | Local SQLite database sandbox | In-app Factory Reset |
| Cloud Backup Archive (Encrypted .hydro) | USER CHOICE | NO | User's private Google Drive storage | Google Drive delete |
5. Data Retention & User Deletion (GDPR / CCPA)
You maintain full ownership and control of your data. Under Application Settings, you can trigger a Factory Reset at any time. This permanently and irrevocably deletes the SQLite database, all plant profiles, history logs, and local images from your device.
For complete step-by-step instructions on erasing all local data and Google Drive backup files, visit our Data Deletion Instructions page.
6. Developer Contact Information
If you have any questions or concerns regarding this Privacy Policy or data security, please contact the developer directly:
- Developer / Publisher: H3DApps / Jiří Herman
- Contact Email: h3dindustry@gmail.com
- Jurisdiction: Czech Republic, European Union