Contains ads
2.49K reviews
Content rating
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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.

- 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:
- NR

Visit and follow us:


Visit our our website cellmapper.net.


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
Updated on
Apr 21, 2022

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Location and Device or other IDs
Data is encrypted in transit
Data can’t be deleted
2.49K reviews
Joshua Gloriod
February 14, 2022
This map is essential for getting the truth of coverage. Nationwide means the carrier lied! You probably don't need the app if you aren't contributing though, just go to the map on website. And if you are contributing--It's a learning curve. This a technical field that some would prefer left obtuse for their own gain. And then there are the problematic implementations by the phone manufacturer... This app is just about as perfect as it can be.
28 people found this review helpful
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A Google user
March 5, 2020
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
23 people found this review helpful
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A Google user
September 5, 2019
Seemed OK at first. But didn't explain enough to a person with limited operational knowledge. Needed to be able to actually input my carrier. Also, I just wanted to see the closest towers to me to decide which provider I would like to switch to. I am on Total Wireless and it seems to not be a good choice for my locality. I think this app is great for very knowledgeable people but, I think for a newbie, not as much. Great job for who it is designed for. Wasn't a fit for me. 😕
7 people found this review helpful
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What's new

- Fixed ads showing for some premium users
- Added option to record data with ARFCN data only
- Fixed NR data stops recording on some devices
- Fixed n40 NR band not showing on some providers
- Fixed n78 showing instead of n77 on some providers