Access RPN Calculator Utilities App Review (iOS, Free)


Languages: English

Seller: Nolan Piper

- mute, key clicks and touch tones
- new app icon
- added %, x^2, and square root functions

Customer Ratings

Current Version:
63 Ratings
All Versions:
150 Ratings


Learn classic RPN (Reverse Polish Notation)* with this animated and easy-to-use 4-function calculator. See the numbers in action and master this alternative calculator logic that students and professionals have appreciated for decades. Advantages include always seeing intermediate results, solving nested equations from the inside out (a logical approach), and often an increased understanding of the math compared to just copying the equation.

If you are new to RPN, make this calculator your first choice. Then check out the advanced programmable version, "Active RPN", which offers more with the same easy-to-use interface.

*Background: numbers are entered first in RPN, and then the operation is applied. e.g. 2 [Enter] 3 + will produce 5.

- visible and animated 4-level stack
- built-in help
- 3 memories

If you are looking for the programmable advanced version, please check out "Active RPN" (click on "ALL APPLICATIONS BY NOLAN PIPER" below). Thank you.

- See it on YouTube -- search "Active RPN calculator"

Customer Reviews

  • Great animation

    by bhima

    I know the principles of RPN, but this app looks like a great way to learn the deeper tricks.

  • Very good, great-looking basic RPN calculator

    by jd2020

    This is my favorite calculator for iOS devices. Its a great looking RPN calculator with basic functions. The style is similar to an HP calculator. Includes enough functions for general daily, and display shows 4 registers. Only draw back was sluggish startup compared with other apps, but this seems to have been corrected in version 1.2.

  • Love it

    by Jase71ds

    I'm not a scientist nor a financialist; I just need basic math functions with semi-large keys and RPN.

  • Very Good RPN Calculator

    by brianpward

    Simple and easy to use, large keys and easy to read labels make this RPN calculator an excellent replacement for the built in iPhone calculator. And it is Free!

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