Nerd Calc (app store)
NerdCalc is an iPhone/iPod Touch app that is a binary, hexadecimal and decimal calculator that displays all three number bases at the same time. With NerdCalc, you can quickly switch which base you are inputting and the result of your calculations is always updated for all three bases, no matter what the current input mode. NerdCalc supports both unsigned and 2’s complement, to allow for negative numbers, and can perform basic arithmetic and logic operations as well as bitwise shifting. Enjoy!
If you feel as though I can make NerdCalc better in any way please feel free to contact me and share your ideas. I hope to hear from you.