PCalc is an ideal app for scientists, engineers, students, programmers, or indeed anybody looking for a feature rich calculator.
It 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.
What's New In This Version: - Added support for the iPad.
You can purchase PCalc RPN Calculator from the App Store for $9.99.
$9.99 for a calculator is ridiculous! I tried the free version and it doesn't work well. The huge buttons just don't feel right on an iPad screen. It's a pain having to stretch across the huge screen just to hit the "9" key.
I found this other app called "Equations" that I really like. It feels more natural, since you type the same way you type in other apps. It also has 60 functions, which is really useful for a college student. It's even half the price of PCalc, which is amazing to me! It's kind of hard to find, so here's a link to it: http://bit.ly/3AH45e