Privacy Policy for CellRadar

1. Overview

CellRadar (the "App", package cz.dkit.cellradar) shows the mobile network cells your phone uses, records GPS-tagged signal measurements, and estimates where the cell towers stand. This Privacy Policy explains what data the App handles, where it goes, and how you control it.

The App has no account, no ads and no analytics or crash-reporting SDKs. We (DKIT) run no servers for the App and never receive, sell, or share your data. What you record stays on your phone. A few features contact third-party services directly from your phone; they are listed below, and the tower lookups can be switched off.

2. Data the App Processes

• Location (precise and approximate) — to tag measurements with where they were taken and to show your position on the map and compass. Android also gives cell details only to apps with precise location access. Logging can continue while the screen is off, but only after you start it, always with a visible notification, and it stops when you stop it.
• Mobile network information — cell identifiers, signal values, timing advance and band, read from your phone's radio.
• Stored on your phone only — measurements (time, position, cell identifiers, signal values), tower estimates, your pins, settings and your optional OpenCelliD API key. They are kept in the App's private storage and excluded from Android cloud backups. Files you export are saved or shared only where you choose.

3. What Leaves Your Phone

The App sends nothing to us. It connects directly to these services, always over HTTPS:

• BeaconDB (beacondb.net) — when Online lookup is on (the default), the identifiers of the cells your phone uses (country and network code, area code, cell ID, PCI, radio type) are sent to look up where those towers are. Cell identifiers reveal roughly where you are. Turn this off in the App under Log → Online lookup.
• OpenCelliD (opencellid.org) — only if you enter your own OpenCelliD API key and Online lookup is on: the same cell identifiers and your key. If OpenCelliD does not know a cell, the App also asks for other cells of the same tower in a square of about 2 km, centred on a point rounded to roughly 500 m from where you received it.
• Map tiles — OpenFreeMap, OpenStreetMap or Esri, depending on the base map you pick. These are ordinary web requests for map images of the area you view; like any web request they include your IP address.

Your GPS track and your measurements are never uploaded. Nothing is sold or used for advertising. Each service handles requests under its own policy: BeaconDB, OpenCelliD (Unwired Labs), OpenStreetMap Foundation, OpenFreeMap and Esri.

4. Permissions

• Location — measurements, map position and access to cell details.
• Foreground service (location) and notifications — background logging that you start, shown by an ongoing notification with a Stop action.
• Internet and network state — tower lookups and map tiles.

5. Your Choices and Deletion

• Switch off Online lookup in the App (Log → Online lookup).
• Stop background logging from its notification or in the App at any time.
• Delete everything the App stored with Log → Clear all data, by clearing its storage in Android settings, or by uninstalling it.

6. Children

The App is a technical tool for adults and is not directed at children under 13.

7. Changes

If this Privacy Policy changes, the new version will be published on this page with a new date.

8. Contact

If you have questions about this Privacy Policy, contact us at info@dkit.cz.