Primarily for converting between number bases but also with simple calculator functions and the advantage of showing simultaneously the same number in Decimal Octal Hex Binary and ASCII. Optional base 3-9 capability (replaces octal). Most calculators display only a single row of digits - this one displays five lines at once.

63-bit capability. Calculator functions AND OR XOR NOT and Shift included. Copy and paste to clipboard.

It is designed for the buttons to be pressed on the screen - you can't use a hardware keyboard.

Android 4.03+. Screens normal or larger (does not support small screens).
Full functionality both portrait and landscape on large screen tablet devices.

Now also displays ASCII.