IP Subnetting is an App that provides functionality as a subnetting calculator and also as training or preparation for the test by practicing subnet & mask & IP & network / netmask. In addition to its practical uses, "IP Subnetting" has a scoring system that tracks the rate of right answers to make the learning experience engaging. Users can even choose to make their scores public to see where they rank on a chart among other users. The application is fully customized by language and theme.