droidmap is an android application for root users that implements some functions of NMAP in a GUI in Android. This program comes with installer scripts for the installation of the required NMAP application that must be run to install the program to your phone. The installation process requires a Linux environment running the Android developer tools from the SDK and this program requires the Android Debug Bridge (adb) for installation. This tool will be really handy for engineers who are on roaming profile and need to find quick result for their customers.
Source: https://thehackernews.com/2010/12/nmap-for-android-phones.html