Privacy Policy — CellRadar
App: CellRadar: WiFi & 5G Signal (com.cellradar.app) Effective date: 31 October 2026 Contact: e11toolapps@gmail.com
Summary
CellRadar measures your mobile signal and Wi-Fi and gives you network tools. It runs on your phone: it has no servers of its own and no user accounts. It is free and shows ads through Google AdMob.
Your signal readings, signal history, recorded walks, saved places, saved Wi-Fi passwords, scan results and settings are stored only on your phone and are removed when you uninstall the app. If you use Android's backup to your Google account, only the app's settings are included: readings, history, saved places and the password vault are excluded.
Data leaves your phone only in these cases:
- Ads — ad requests to Google AdMob (see Advertising).
- Crash reports and usage statistics — to Google Firebase, unless you turn them off (see Crash reporting and Usage analytics).
- Online tools you choose to use — map tiles, place search, routes, the speed test and the lookup tools contact the services listed under Online tools. Each request is sent only when you use that feature.
We never sell your data.
What the app accesses, and why
| Permission / capability | Why it's used | Leaves your phone? |
|---|---|---|
| Location (precise and approximate) | Android only shares Wi-Fi network names and cell tower details with apps that have location access. Used to read your signal, show your position on the signal map, tag your own signal readings, show the GPS satellites in the Sky View, and (only if you switch it on) warn you before places where your phone has measured weak signal. Location is used only while the app is open on screen: CellRadar never asks for background location, and readings logged in the background are saved without coordinates | No — readings are stored on the phone. The map's tile, search and route requests are described under Online tools |
| Phone state (READ_PHONE_STATE) | Read signal strength, network type, carrier and SIM details, and whether the phone reports a satellite connection (Android 15+) | No |
| Wi-Fi state / change Wi-Fi state / nearby Wi-Fi devices | Scan nearby Wi-Fi networks, channels and signal; join a network from a QR code you scan | No |
| Network access for the tools | The device scanner and Wake-on-LAN talk only to devices on your own network. Ping, traceroute, the port check, SSH/Telnet and SNMP contact only the device or host you choose (see Online tools) | Only to the host you choose |
| Nearby Bluetooth devices (BLUETOOTH_SCAN; location on Android 11 and older) | Privacy Sweep lists Bluetooth LE devices near you (name, maker, signal strength) when you tap Start sweep. Android 12+ is told the results are never used to work out your location | No — the list is shown on screen only and is not saved |
| Notifications | Optional alerts when your signal drops or returns, and from monitors you set up | No |
| Foreground service | Keep the optional live signal monitor running after you switch it on in Settings; stop it any time from its notification. Scheduled checks you set up run through Android's job scheduler | No |
| Biometrics | Unlock the optional Wi-Fi password vault | No — passwords are encrypted on the phone |
| QR scanner | Uses Google Play services' code scanner, so CellRadar itself never gets camera access | No |
| Voice search (map) | Uses your phone's own speech service; CellRadar receives only the recognised text, never audio, and has no microphone permission | Handled by your phone's speech service under its own policy |
| Storage (Android 9 and older only) | Save a Wi-Fi QR image you create to your Pictures folder | No |
Online tools
These services receive a request only when you use the feature, and only the data needed for it. They are operated by third parties under their own privacy policies.
| Feature | Service | What it receives |
|---|---|---|
| Signal map tiles | OpenFreeMap (tiles.openfreemap.org); the optional transit layer from MeMoMaps (tile.memomaps.de) | Your IP address and which map area is being viewed |
| Place search and suggestions | Photon by komoot (photon.komoot.io) and your phone's built-in place lookup (Android's geocoder, provided by Google on most phones), while you type and when you search; Nominatim (OpenStreetMap) only if both are unavailable | The text you type (from 3 letters, after a short pause). To list nearby places first, they also receive the centre of the map area you are viewing, or your position, rounded to about 1 km |
| Directions | FOSSGIS OSRM servers (routing.openstreetmap.de) | Start and end coordinates of the route you ask for |
| "Open in map" | OpenStreetMap (www.openstreetmap.org), opened in your browser only when you tap it | The location you chose to open |
| Speed test | Cloudflare (speed.cloudflare.com) | Your IP address and test traffic |
| Network Doctor, quality score, connection advisor, scheduled checks you set up | Cloudflare (speed.cloudflare.com, 1.1.1.1), Google (www.google.com, 8.8.8.8, connectivitycheck.gstatic.com) | Your IP address and short test traffic (pings, name lookups, a download/upload test when you choose it) |
| Ping, traceroute, port check and DNS lookup tools | The host you enter, or the public DNS server you pick (Cloudflare, Google, Quad9, OpenDNS) | Your IP address and the name or address you test |
| SSH / Telnet terminal and SNMP | The host you enter | Your IP address, and the commands, user name, password or SNMP community you type, sent straight to that host. Telnet and SNMP v1/v2c are not encrypted, which the app points out |
| Public IP / IP lookup | ipify.org, ipwho.is | Your IP address, or the IP you look up |
| WHOIS / domain lookup | rdap.org and the domain's registry | The domain or IP you look up |
| Device maker lookup | macvendors.com | The first half of a device's MAC address (the maker prefix). Looked up automatically for devices the scanner and Wi-Fi analyzer find, when the app's built-in list doesn't know the maker |
Advertising
CellRadar is free and supported by ads from Google AdMob. To show ads, AdMob receives your device's advertising ID and standard technical information such as device type, approximate location derived from your IP address, and ad interactions. This is handled by Google — see Google's Privacy Policy and How Google uses information from partner sites and apps.
Consent: before any ad is requested, the app runs Google's consent tool (User Messaging Platform). In the EEA, the UK and Switzerland you can accept, refuse or choose purposes, and change your choice at any time in Settings → Privacy & ad choices. You can also reset or delete your advertising ID in Android Settings.
Usage analytics
CellRadar uses Google Analytics for Firebase to see whether features are used to completion, how ad frequency affects how long people keep the app, and which ad campaigns bring people who actually open it. It is on by default; you can turn it off at any time in Settings → Legal → Share anonymous usage stats.
- Sent: a random app-instance ID and Firebase installation ID; device model, Android version, app version and language; country and approximate location derived from your IP address; session and engagement time; and a few fixed events — that a task finished (for example "speed test done"), whether a full-screen ad was shown or skipped and why, and ad impressions from AdMob.
- Advertising ID: sent with the app's first open only so Google can tell which ad campaign led to the install. It is never used for personalised ads: ad personalisation is always switched off for analytics.
- Not sent: network names, IP or MAC addresses you scanned, signal readings, locations, or anything you type.
- Your choice: switch off Share anonymous usage stats in Settings and analytics stops collecting at once. In the EEA, the UK and Switzerland it also follows the choices you make in Google's consent form.
Firebase Remote Config lets us adjust settings such as how often full-screen ads may appear, without an app update. It receives the Firebase installation ID, app version, country and language.
Crash reporting
Firebase Crashlytics reports crashes so they can be fixed: the stack trace, app version, device model, Android version, free memory and storage, and a random Firebase installation ID. Reports contain no names, contacts, network names, readings or locations. Debug builds never send crash reports.
Data retention and deletion
Everything the app stores lives on your phone. Delete it any time by clearing the app's storage in Android Settings or by uninstalling the app; that also resets the random Firebase identifiers. Google deletes event-level analytics data after 2 months. You can email us to ask about any data.
Children
CellRadar is a general-purpose utility and is not directed at children under 13.
Changes
If this policy changes, the new version will be posted at the same address with a new effective date.
Contact
e11toolapps@gmail.com