YarrRPN is a clean, elegant, easy-to-use and powerful RPN calculator for your iPhone or iPod.

When you hold your iPhone/iPod upright, YarrRPN is a basic calculator with a easy-to use layout. The percent function is awesome for calculating sales taxes, tips at a restaurant, etc.

Tilt the device sideways and YarrRPN turns into a powerful scientific calculator with a wealth of useful functions. But rest assured: all this functionality doesn't clutter the calculator's layout.


Features:

  • Bootylicious design inspired by the Apple Keyboard
  • Reverse Polish Notation (a.k.a. postfix, stack-based)
  • High precision engine that can handle very small and very large numbers
  • Behavior inspired by HP calculators
  • Memory slot
  • Undo function
  • Basic arithmetic functions
  • Percentage function
  • Basic stack operatione (push, pop, swap, clear)
  • Enter exponential numbers using the "EEX" key (e.g: "6.02E23")
  • Basic scientific functions like nth root, sqrt, square, pow, 1/x, etc.
  • 24 Trigonometric functions that support both radians and degrees:
    • Basic: sin, cos, tan, csc, sec, cot
    • Inverse: asin, acos, atan, acsc, asec, acot
    • Hyperbolic: sinh, cosh, tanh, csch, sech, tanh
    • Inverse Hyperbolic: asinh, acosh, atanh, acsch, asech, acoth
  • base e and base 10 logarithmic and exponential functions
  • Statistical functions: Mean (average), Standard Deviation, factorial (n!)
  • Tip: use undo function to calculate std. dev. after calculating mean on a set of numbers
  • Optional Key click sound
  • Optional vibrate (or beep on iPod) on illegal operation
  • Optional animated screen gloss

What is an RPN Calculator? In a nutshell: Instead of entering "3 + 4 =", you enter "3 4 +". With RPN, you don't need parenthesis. It's very efficient for doing complex calculations. Once you get used to RPN, you won't ever want to go back. Learn more about RPN

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