Nmap is one of the most improtant tools for every cracker (white, grey black hat "hacker"). Nmap is a legendary hack tool and probably the prevelent networt security port scanner tool over the last 10 years on all major Operating Systems. So far it was available in windows, linux and Mac OS X. But now its available at android platform too. It is compiled from real Nmap source code by some developers to provide the support for android devices.