This application is a simple wrapper around the ncat binary cross-compiled for Android from the Nmap source. This is not an official Nmap application. Ncat is a powerful networking tool, it allows you to perform a variety of operations, such as (and absolutely not limited to): - Open TCP connections - Listen on TCP ports - Send UDP datagrams - Receive UDP datagrams - Execute system commands and redirect IO to sockets. If you have never used nc, ncat (or any other netcat implementation before)