$14.99 from Thomas Fors LLC
The SCI-11C is the most accurate and precise emulator of the world-renowned HP-11C RPN mid-range scientific programmable calculator available for the iPhone and iPod Touch. We use the *exact same* mathematics and calculations of the original to give you reliable, bug-free, precision and accuracy that you can trust.
* Hyperbolic and inverse hyperbolic trig functions
* Probability (combinations and permutations)
* Factorial, % change, and absolute value
* Random number generator
* RPN entry