Coder Calc is a full featured scientific calculator tailored for programmers.
Best of all, it operates in Standard or Reverse Polish Notation modes, complete with a multi-line stack display! If you have an iPad, you also get the Scratch Pad, which is a neat way to work with stack values using your fingers.
In addition to the usual hexadecimal and binary base conversion, it features extensive programming-specific functions such as bit shifting, masking, two's complement, IEEE-754 conversion, and more. You can enter data in decimal, hex, or binary, and types can be mixed freely. Coder Calc also features a full suite of scientific and engineering operations. The operations are tailored to your preferred orientation, so depending on how you old the device, you get a different experience.
There are extensive customization options for appearance and function. Graphically, it's made to look right at home on your iPhone. If you've always felt calculators needed shinier buttons, then Coder Calc is for you!
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