CellMapper

CellMapper.net

Contains adsIn-app purchases

About this app

CellMapper displays advanced 2G/3G/4G/5G (NSA and SA) cellular network information and can also record this data to allow you to contribute to our crowd-sourced coverage maps.

CellMapper works on both tablets and phones running Android 4.0 or higher.

Features
- Displays low level cellular network information data along with frequency band calculations (for some providers)
- Reads cellular frequencies and bandwidths on supported Android 7.0+ devices
- Displays a map of both coverage and individual tower sector coverage and bands
- Supports Dual SIMs devices
- Frequency calculator (GSM, iDEN, CDMA, UMTS, LTE, and NR)

Note: The data on the site and within the app is generated shortly after it is uploaded, it may take up to a few days to appear.

Currently supported networks:
- GSM
- UMTS
- CDMA
- LTE
- NR


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Visit our our website cellmapper.net.

Permissions

Why does CellMapper need so many permissions?
"make and manage phone calls" - This is required to get low level network data from your device
"access to device location" - In order to map and contribute, we will need to know where the data was recorded from your device.

Older versions of Android:
android.permission.ACCESS_COARSE_LOCATION - To get CellID information
android.permission.ACCESS_FINE_LOCATION - To get GPS location
android.permission.ACCESS_NETWORK_STATE - To get Cellular network information
android.permission.INTERNET - To connect to server to download map data / upload data
android.permission.READ_EXTERNAL_STORAGE - To write external CSV file if no internet connection
android.permission.READ_LOGS - To read Samsung Field Test Mode data on Android 4.1 and earlier (despite what the dialog says, the app cannot read your browsing history unless your browser write it to the system log)
android.permission.READ_PHONE_STATE - To read info about airplane mode / network settings
android.permission.RECEIVE_BOOT_COMPLETED - To start at boot time (if enabled)
android.permission.VIBRATE - To vibrate on CellID change (if enabled)
android.permission.WAKE_LOCK - For phones that do not support 4.2+ CellID Support, to ensure they report correct data
android.permission.WRITE_EXTERNAL_STORAGE - To write external CSV file and debug report

Ratings and reviews

Edit: since the most recent update the map is awful and extremely slow and laggy and very difficult to use. It seems like a very rushed update with no polish to it. Put the map back (I'll even pay more if it's a Google API thing). Lots of raw data which can understandibly be confusing for people who aren't familiar with wireless. The only thing that could help the everyday user is a simple mode that only shows the basic carriers and verified towers with signal strength.

Used to be good, not so much now. When I first started using the app, it added the data liked they advertised, within a week. Sometime during the summer, my data stopped showing up. I complained, and they suggested I try the premium service and data would show up within hours. All it did was return the weekly updates for the first month. By the second month, the data is taking about a month. I've now cancelled, and I'm not sure I'll do anymore collections. 2020/03/05: there data updates are good

Very informative on my Pixel 4. I see that towers near me are being updated. However, the learning curve is steep; e.g., you need to learn what bands are relevant to you elsewhere. And the app is buggy; it stops running overnight or becomes locked to one tower. Also the tower selection UI needs improvement; it may show an old tower that hasn't been seen in over a year on top of a newer one and there's no easy way to select overlapped towers except excessive tapping until they're selected.

What's new

- Bug/crash fixes
- Android 13 optimizations
- Added support for reading bandwidth of component carriers on supported devices
- Added option to use Google Pay to subscribe to premium