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 7.0 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

I've used this app for better part of over a year. I've been on on Road trips over 40,000 miles traveled within one year. This has always ran in the background on my phone to try to capture data. Unfortunately sometimes it seems to not capture data accurately, or doesn't log data at all. But when it is able to it's spot on. I give the app the best opportunity possible to run. No battery optimizations, or background restrictions and no data restrictions. Great app when it works correctly

Mixed feelings. When the app works, it seems to be accurate, except it shows a cell tower on top of my house. Every so often a challenge to match items (how many cars in an image). Have to go through about 20 to continue. And GPS rarely works. Reset phone and once it corrected this but not since.. Love it accurately shows active cells but it has drawbacks.

For the last few years now, the developer ignores complaints. All along, the magnifying glass defaults to East Timor when it cannot figure out where you are, likely because it's the first in the list. I don't even know where that is, except that it's nowhere near me. And they have implemented a Captcha that doesn't work, which prevents you from changing it yourself. I still like the app, except that it's becoming less and less usable. The developer used to fix the problems, but no more.

What's new

- Map improvements (save last location, UI glitches, frequent CAPTCHA)
- Ability to automatically exit the app when battery is low
- Fixed screen turning on when phone locked on certain Android versions
- Updated translations
- Many smaller bug fixes
- Bug fixes