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MathU RPN Calc

MathU RPN Calc

Advanced scientific calculator

87 ratings
65 reviews
#87 in paid Finance
๐Ÿ”ง Utilities
๐Ÿ’ฐ Finance
$24.99

Details

  • Released
  • Updated
  • October 17, 2008
  • May 15, 2026

Developer

Creative Creek, LLC
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MathU RPN Calc screenshot #1 for iPhone
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About

This advanced scientific and financial calculator utilizes the Reverse Polish Notation (RPN) system. It offers over 96 functions, catering to professionals with features for finance, programming, and general scientific calculations. Optimized for iOS devices, it provides a robust and accurate computational experience.

โœ“RPN entry system
โœ“Over 96 functions
โœ“Scientific calculations
โœ“Financial calculations (IRR, NPV, mortgage)
โœ“Programmer's calculator (HEX, OCT, DEC, BIN)
โœ“IEEE double precision accuracy
โœ“Portrait/landscape keypad switching
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What's New in MathU RPN Calc

4.1.4

May 15, 2026

We are excited to announce that MathU RPN now runs on macOS as well as iOS! Both Intel and Apple Silicon is supported for macOS. The 4.1.4 release fixes a minor layout bug I found after the previous release. Keyboard support: An attached external keyboard can be used with the calculator to access the functions (type of name on the top if a button). Tap the Key Help button to see what strings will work to "press" a button on the keypad.

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Charts

Top Paid

๐Ÿ“‰ย 87-3

Finance

This app dropped -3 positions in Finance chart.

Last updated on July 24, 2026.

User reviews

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The best

I love this app! Why canโ€™t they make a similar app for Windows?
GuyFewkesGuyFewkes

This is the RPN Calculator to Get

An old favorite, nay necessity, from my Palm days, I'm very happy to have this essential application for my iPod Touch. It works just like an old school HP Calculator, circa the HP-11 and 12 series, with the added bonus of an extended stack and scientific as well as financial functions. The original for the Palm was programable and there were several program suites that you can add on -- I hope these feature are forthcoming. However, given the excellent execution of this program, it's ease of use, and Creative Creek's very fine customer service, I do not hesitate giving this app 5 stars. Well done!
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gar in oaklandgar in oakland

Great RPN Calculator!

Combines scientific and financial functions in the traditional HP style
biz217biz217

Best of the RPN calculators

Does all the scientific calculations and most common financial ones too. Works exactly like the old HP RPN calculators with no quirks. Available on iOS, Android, and OS X.
CageycruzCageycruz

Love this calculator!

This is my daily go-to calculator. It's also my absolute favorite HP emulator! It does everything I need from a calculator. Great combination of functions! Anyone who used the older vintage HPs will appreciate this calculator. Thank you Dr. Thompson for keeping this app current!
BearcreekmomBearcreekmom
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FAQ

What is MathU RPN Calc?

MathU RPN Calc is an advanced scientific, financial, and programmer's calculator that uses the Reverse Polish Notation (RPN) entry system. It offers over 96 functions and is designed for professionals who need a powerful and accurate computational tool.

What kind of calculations can MathU RPN Calc perform?

It can perform a wide range of calculations, including full sets of trigonometric, logarithmic, and power functions, statistics, polar and rectangular conversions, mortgage and loan computations (IRR, NPV), date functions, and number base conversions (HEX, OCT, DEC, BIN) with bitwise logical operations for programming.

Is MathU RPN Calc free to use?

Based on the provided information, MathU RPN Calc is a paid application. It does not appear to have in-app purchases or advertisements, indicating a one-time purchase model.

What devices is MathU RPN Calc compatible with?

MathU RPN Calc is compatible with iPhone, iPad, and macOS devices. It supports iOS 16.6 or higher. The app adapts its layout for different screen orientations and can utilize hardware keyboards on iPads.

Who would benefit from using MathU RPN Calc?

This app is ideal for professionals in finance, engineering, and computer science, as well as students and hobbyists who prefer or require the RPN input method for complex calculations. Its extensive function set makes it suitable for daily professional use.