BigStack RPN Calculator

BigStack RPN Calculator — the premier RPN Calculator for the iPhone and iPod Touch!

Available at the iTunes app store (link will open in iTunes)

Features

- The biggest stack of any RPN calculator. You can see up to 15 values on the stack at any one time. And the size of the stack is limited only by the memory available on your iPhone or iPod Touch.
- Undo functionality! Pushed the wrong button and messed up your calculation? No problem. The BigStack RPN Calculator lets you undo up to the last 50 calculations.
- Full control over the display of values on the stack. You can choose from four display modes (fixed, precision, scientific, engineering) and select precision from 2 to 12 digits.
- A European number formatting option.
- Commification of numbers in the stack, even when entering new values.
- The full compliment of scientific functionality that you expect from an RPN calculator including logs, trig functions, inverse trig functions, and hyperbolic trig functions.
- A full compliment of statistics functionality that allows the computation of statistics on data samples.
- A "big-button" mode that makes it easy to use even in adverse conditions.
- The ability to compute upper-tail probabilities for normal, student's-t, chi-square, and f-distributions.
- Random number generation from both uniform and normal distributions.
- Calculation of permutations and combinations.
- All calculations are performed using double precision.
- An aesthetically pleasing design.
- Works on both the iPhone and the iPod Touch.
- Graceful handling of error conditions.
- A Lite Version, available for free, great for basic functionality or for trying out the BigStack calculator.