PCalc – The Best Calculator
($9.99) First of all, any app that Josh Clark features in his O’Reilly book “Tapworthy” comes highly recommended. PCalc is a calculator for programmers, scientists, engineers, and students. It’s a full-featured scientific calculator that “includes an optional RPN mode and multi-line display, a choice of button layouts, an extensive set of unit conversions, a paper tape, multiple undo and redo, engineering and scientific notation, as well as support for hexadecimal, octal, and binary calculations.” There is also a free version.
Calc Neon
(.99) Make math more fun with a neon calculator!
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Pi Cubed
($9.99) Lets you construct mathematical expressions visually like you would on a blackboard. There’s also a free version.
Download
Mediquations Medical Calculator
Recommended by @HospitalistDoc, Mediquations features 228 formulas and scores, such as LDL cholesterol estimation or mean arterial pressure.
