BaseCalc is a programmer's calculator with a clean and minimalist interface for iOS7. It supports direct input and output in bases 2, 10, 16, and special IPv4 format. On top of the classical 4 operations, you can execute common bitwise operations [AND, OR, XOR, NOR, ROTATE, SHIFT, ARITHMETIC SHIFT].
Preference settings allow selecting internal word size (8, 16, 32, or 64 bits), signed/unsigned operations, representation mode (padding, IPv4, ...).