# RePNCalc - RPN Calculator Pro — Easy Reverse Polish Notation

> Reverse Polish Notation (RPN) calculator app for iOS with customizable layouts. (iPhone/iPad app by Michael Redig.)

- Source: https://appshunter.io/ios/app/repncalc-rpn-calculator-pro/id969780852 (this page in markdown: same URL + `.md`)
- Developer: [Michael Redig](https://appshunter.io/developer/761861103)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 8 MB
- Languages: American English
- Released: 2015-04-01
- Data updated: 2026-06-11
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/repncalc-rpn-calculator-pro/id969780852/reviews.md

## What is RePNCalc?

Crunch your numbers with the rpn calculator that fits right along side every other iOS app! Don't get held back by the conventions of traditional, keyboarded calculators that can't update their buttons with new functions without the use of a shift key! Use technology from the future, like swipe gestures to change key layouts or touching and holding a stack item to get a popup granting a range of options.

This calculator app uses the alternative method called "reverse polish notation" to provide input for calculations. For the curious, check out http://en.wikipedia.org/wiki/Reverse_Polish_notation for more information.

You can now also use external keyboards for input, not just the buttons on screen.

Purchasing the full version (in the app) unlocks full functionality. Included is basic functionality (+, -, x, and ÷) and complete support for iPad, iPhone, and iPod touch. It also runs well on Apple Silicon Macs with keyboard support!

## Key features

- Reverse Polish Notation (RPN) input
- Swipe gesture key layout customization
- Long-press stack item options
- External keyboard support
- Full iPad, iPhone, and iPod touch support

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Unlock Advanced Functions | $0.99 | one-time |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/repncalc-rpn-calculator-pro/id969780852/reviews.md

### 3/5 — Educational stack

*2022-06-20*

A large, permanently visible stack makes this an ideal tool for anyone wishing to see the advantages of Reverse Polish Notation (RPN) in action. It is easily this app's best feature, and enhanced by a good choice of stack manipulation functions.

However, I'd prefer a nicer interface.
The digits seem unnecessarily small and an option to change that baby-blue would be more appealing. The flat, lifeless white background does not help.

## Frequently asked questions about RePNCalc

### What is Reverse Polish Notation (RPN) in RePNCalc?

Reverse Polish Notation (RPN) is an alternative input method for calculations where operators follow their operands. This differs from traditional calculators where operators are placed between numbers. You can learn more at http://en.wikipedia.org/wiki/Reverse_Polish_notation.

### Does RePNCalc have ads?

No, RePNCalc does not contain advertisements. The app is free to download and use with basic functionality, with an option to purchase the full version for advanced features.

### What devices does RePNCalc support?

RePNCalc fully supports iPhone, iPad, and iPod touch devices. It also runs well on Apple Silicon Macs when using a keyboard.

### How do I customize the key layout in RePNCalc?

You can customize the key layout in RePNCalc using swipe gestures. This allows for dynamic changes to the calculator's buttons without needing a shift key.

### Can I use an external keyboard with RePNCalc?

Yes, RePNCalc supports input from external keyboards in addition to its on-screen buttons, enhancing usability for some users.

### What is the age rating for RePNCalc?

RePNCalc has an age rating of 4+, making it suitable for a wide range of users. The app's functionality is focused on mathematical calculations.

### How often is RePNCalc updated?

The latest version of RePNCalc is 1.3.2, last updated on January 22, 2025. This indicates a history of ongoing development and support for the application.

### What are the basic functions included in the free version of RePNCalc?

The basic functionality included in the free version of RePNCalc covers essential arithmetic operations: addition (+), subtraction (-), multiplication (x), and division (÷).

## Version history (last 5 releases)

### 1.3.2 — 2025-01-22

Fixed an issue where decimal key input was ignored on keyboards

### 1.3.1 — 2024-11-10

Bug fix for displaying long values

### 1.3.0 — 2024-10-28

- Dark mode support!
- Cleaner, prettier buttons uwu
	- Inverse functions now color coded - wow!
- More modern code base    s(-_-)b
- Improved keyboard support
- Bug fixes

### 1.2.0 — 2021-07-19

Improved stability and keyboard support.

### 1.1.3 — 2019-04-11

Fixed a bug and updated dependencies.

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## More apps by Michael Redig

- [Doku Lite](https://appshunter.io/ios/app/doku-lite/id762986579)
- [ArcadeDefense](https://appshunter.io/ios/app/arcadedefense/id773023784)
- [Poopmaster](https://appshunter.io/ios/app/poopmaster/id1398083909)
- [Poopmaster Pro](https://appshunter.io/ios/app/poopmaster-pro/id1484761330)

All apps by Michael Redig: https://appshunter.io/developer/761861103

## Related topics

[rpn calc pro](https://appshunter.io/ios/topics/rpn-calc-pro)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-11.*