The OpenCellID contributor's app.
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Tower Collector

Join the OpenCellID community and collect cell towers' locations from your area!

The app is designed to help map the extent of mobile phone network coverage of GSM/UMTS/LTE/CDMA cell towers using GPS locations. This is accomplished by reading GPS coordinates and identifiers of mobile network transmitters in regular intervals. Collected information is saved on your phone's storage and can be uploaded directly to the OpenCellID database. It is also possible to collect measurements for private purposes and export them to CSV or GPX files.

How to Get

Tower Collector is available for free on the Google Play store:

Get it on Google Play

and on official F-Droid catalog:

Get it on F-Droid


This project is build using Android Studio 3.1.3.

To build your own signed apk go to "app/properties" and:

  1. Place your keystore file inside the folder.
  2. Copy "" as "" in the same directory and adjust it accordingly.
  3. Copy "google-services-example.json" as "google-services.json" in the same directory and adjust it accordingly or place your own generated file there.
  4. These files will be ignored so don't worry about committing them by mistake.

Bug reports and feature requests

Please report any bugs or submit feature requests through the Issues tab on this page or email me directly.


If you would like to help out with translation, please visit


Tower Collector is licensed under the Mozilla Public License 2.0. A copy of this license is included in LICENSE.txt.