Subnet Calc HD is a network administrators toolbox for IPv4 subnetting. It shows you all information about subnets in decimal, hexadecimal and binary formats and allows you to save subnets for easy access later. There is also a handy calculator always available at the tap of a button and an aggregator to allow you to find the smallest subnet that encompasses a given set of IP addresses.
Subnet Calc HD is a valuable tool for any network administrator who owns an iPad and a great compliment to Subnet Calc & Subnet Calc Pro for iPhone.