Privacy Policy

1. General Information

Eser Su Arıtma ("We", "App") is a mobile application for service tracking, filter replacement reminders and appointment management for water purification devices. This policy explains what data the app processes, where it is stored and how it is protected.

Data controller: Eser Su Arıtma (Denizli, Türkiye).

The app is distributed through Google Play and the Apple App Store. This page is the official text of the privacy policy link declared on the store listings.

2. Data Collected

2.1 Data entered by service staff

• Customer name, phone number, address: service scheduling and communication
• Device information (device type, installation date): maintenance tracking
• Filter information (filter name, replacement interval, last replacement date)
• Service records (date, type, fee, notes)

2.2 Data created by customers

• Fault reports (date, description)
• Appointment requests (date, time, description)

2.3 Technical data

• Anonymous user ID generated by Firebase Authentication
• Filter reminders are scheduled as local notifications on the device; no notification token is sent to a server

2.4 Staff account data

• Username, full name and role (administrator/staff)
• Password digest: passwords are never stored in plain text; a random salt and SHA-256 digest are kept
• Account creation and last update timestamps

The app does not collect location, contacts, camera, microphone or advertising ID.

3. Purpose of Processing

• Service scheduling and tracking
• Filter replacement reminders (notifications)
• Delivering customer fault and appointment requests to staff
• Showing service history to the customer
• Cloud backup and cross-device synchronization

4. Data Sharing

Personal data is not sold or shared with third parties for marketing.

Data is processed on Google Firebase infrastructure (Firestore and Authentication) to operate the service. See Google's terms: firebase.google.com/support/privacy

Disclosure may occur only where required by law.

5. Data Retention and Security

• Data is stored in local device storage (a SQLite database on Android, app storage on iOS) and in Google Cloud Firestore in the cloud.
• All device-to-cloud communication uses HTTPS/TLS encryption.
• Google Cloud encrypts data at rest by default.
• The app processes only records entered by authorized staff and the customer's own requests.
• Access to Firebase is limited to app instances signed in with an anonymous session.

6. User Rights (KVKK / GDPR)

• Access: Customers can view their own device, filter and service history in the app.
• Rectification: Contact service staff to correct inaccurate data.
• Erasure: Request deletion at the contact address below. Requests are fulfilled within 30 days after verification.
• Portability: Staff can export records as CSV (Settings > Export CSV).
• Notifications: App notifications can be disabled in iOS Settings > Notifications or in Android settings.

7. Retention

Records are kept for the duration of the customer relationship and as required by law. Personal data is removed upon a verified deletion request.

8. Children's Privacy

The app is not directed to children under 13. We do not knowingly collect data from children.

9. Changes

Policy updates will be announced in the app or on the store listing. The current text is always published on this page.

10. Contact

For privacy and deletion requests:

This policy takes effect on November 5, 2026 and applies in all countries where the app is published.