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RPN 30

RPN 30

An awesome RPN calculator!

154 ratings
31 reviews
🔧 Utilities
💰 Finance

Archived App (Last seen on 30 Jan 2025)

This is an archived listing of the app previously available on the App Store.

Although the app is no longer distributed by Apple, you can still view its description, screenshots, version history, ratings, and metadata for reference.

Details

  • Released
  • Updated
  • February 4, 2019
  • October 24, 2022

Features

Developer

Ashok Khanna
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⭐31
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🔄6+ apps
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❓5 answered
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📦w/o updates
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About

This application offers a calculator that utilizes Reverse Polish Notation (RPN) for calculations. RPN allows users to enter numbers before the operator, which many find more intuitive. It features an artistic design inspired by standard calculators and includes a help guide for new users.

✓Reverse Polish Notation (RPN) calculation
✓Intuitive user interface
✓Inspired by standard calculator design
✓Includes a help guide
✓Ad-free experience
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What's New in RPN 30

2.40

October 24, 2022

Added functions for converting from polar coordinates (in degrees) to rectangular and vice versa.

User reviews

Most RecentHighest RatedLowest Rated

The Store/Recall functionality is awkward. The need to hold two buttons at once is clumsy.

A generally smooth and uncomplicated system is not applied to the store/ recall implementation
johnnymogsjohnnymogs

Love the streamlined operation

Big buttons and smooth navigation across the pages. You should apply your talents to make a better (similar) Watch experience. All too crowded and clunky.
johnnymogsjohnnymogs

Need improvements

I’ve been using a physical 42S and emulator on my phone for years. The down side is that the keys and display font are small. Apple default calculator app, on the other hand, have very large font and large key size, but it’s not RPN. This calculator here has the potential to be a great alternative to both, but it’s not (yet).

1. Stack display is a bit confusing. Took me a while to figure out Y is on top left corner, and then the next 3 levels up on the right. It would be more consistent if you skip the top left corner position, and just have the stack on the right.
2. While alternate functions are activated by long pressing the number keys/layer, in the advanced function keys/layer, it requires pressing ALT then another key. Why the different behavior?
3. Store/recall does not work at all.
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Purple_RWPurple_RW

Huh???

I agree with Talasoft guy. I went through engineering school using an HP 15 C calculator. I found this calculator too confusing to use. The developer might want to consider that people looking for an RPN calculator app are those of us who are familiar with RPN and don’t want to carry around a calculator anymore. In other words don’t alienate the people who are most likely to use your app. Furthermore, I am not sure anyone trying to learn RPN will make any sense to what’s happening on this calculator.
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really not happeningreally not happening

Awesome

Nice and simple RPN calculator. If the font size of the stack numbers were bigger, it would be perfect.
CheungHe87CheungHe87
See 26 more reviews

FAQ

What is Reverse Polish Notation (RPN)?

Reverse Polish Notation (RPN) is a method of calculation where numbers are entered first, followed by the operator. For example, to add 53 and 47, you would enter '53 47 +' instead of '53 + 47'. Many users find this method more intuitive and efficient than standard algebraic notation.

What are the key features of this RPN calculator?

This application provides a calculator that uses Reverse Polish Notation for all calculations. It boasts an intuitive user interface inspired by standard calculator designs and includes a helpful guide accessible via a long press on the help button to assist users in getting the most out of its functionality.

Is this app free to use?

Yes, this application is completely free to use. It does not feature any ads or paid features, ensuring an uninterrupted and cost-free experience for all users. You can enjoy all its functionalities without any financial commitment.

Who would benefit from using this RPN calculator?

This calculator is ideal for individuals who are already familiar with and prefer using Reverse Polish Notation for their mathematical tasks. It's also a great tool for students or professionals looking to explore and adopt a more intuitive calculation method.

How do I learn to use the RPN calculator?

The application includes a short help guide to assist users in understanding and utilizing the RPN functionality. You can access this guide by performing a long press on the help button within the app. Spending a few minutes with the guide will help you get the most out of the calculator.