Phone Number Tracker is a free Android app developed by BALU INFO that falls under the Utilities & Tools category. With this app, users can get detailed information about phone numbers, including STD and ISD codes, as well as the location of the caller and their network information.

The app is easy to use and provides accurate information about phone numbers. Additionally, it can function without an internet connection, making it a useful tool for those without access to data. It's worth noting, however, that the app does not display the caller's actual physical location. Furthermore, Phone Number Tracker does not submit any personal data, such as contacts or user location, to the server.