# bcRPN

> Reverse Polish Notation calculator with complex number support and extended precision. (iPhone/iPad app by Paul Wilkins.)

- Source: https://appshunter.io/ios/app/bcrpn/id1614744829 (this page in markdown: same URL + `.md`)
- Developer: [Paul Wilkins](https://appshunter.io/developer/1614739840)
- Category: Utilities, Finance
- Price: Free
- Rating: 4.75/5 from 4 App Store ratings · 5 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 0 MB
- Languages: English
- Released: 2022-04-18
- Data updated: 2026-08-02
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/bcrpn/id1614744829/reviews.md

## What is bcRPN?

This is a RPN (Reverse Polish Notation) Calculator.  It supports complex numbers and uses extended precision math for all operations.  The stack depth is unlimited.  In case a mistake was made, up to 10 operations can be undone.

RPN calculators work by entering the numbers on the stack first, then selecting the operation.  For example to add 3 + 4, press:
3
Enter
4
+

## Key features

- Reverse Polish Notation (RPN) input
- Complex number calculations
- Extended precision math
- Unlimited stack depth
- Undo functionality (up to 10 operations)

## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/bcrpn/id1614744829/reviews.md

### 5/5 — Best RPN Calc

*2026-01-31*

I never write reviews, and I collect RPN calculators. This is the best RPN calc on iOS

### 5/5 — Great

*2025-10-20*

Clean interface. Complex operations great! Thank you.

### 4/5 — Best RPN Calculator App

*2025-07-31*

This is the best RPN calculator I've used on iOS. It is functional, fast, has gestures, and most importantly has an undo button, something that most RPN calculator apps lack. 
Best of all this is free. 
To the developer; Thank you so much for this calculator.
The only flaw is the lack of rolling.

### 5/5 — Best RPN Calculator App

*2025-07-23*

This is the best RPN calculator I've used on iOS. It is functional, fast, has gestures, and most importantly has an undo button, something that most RPN calculator apps lack. 
Best of all this is free. 
To the developer; Thank you so much for this calculator.

### 3/5 — Clearly aimed at the touchscreens

*2024-09-09*

It runs on MacOSX 14.6.
It requires mouse input. Doesn't take keyboard input (can't be sure about keypad, since I don't have one.)
1⮐2⮐3⮐    gives 6 (standard for RPL, not standard for most short-stack RPN, which give 7) 
So...not much use for me. Not bad, but missing the one key feature: use of the standard keyboard.

## Frequently asked questions about bcRPN

### What is bcRPN?

bcRPN is a Reverse Polish Notation calculator that supports complex numbers and uses extended precision math for all operations. It offers an unlimited stack depth and allows users to undo up to 10 operations.

### How does bcRPN handle complex numbers?

bcRPN is designed to perform calculations with complex numbers, utilizing extended precision math for accuracy in all operations.

### What is the stack depth in bcRPN?

bcRPN features an unlimited stack depth, allowing for extensive calculations without limitations.

### Can I undo mistakes in bcRPN?

Yes, bcRPN provides an undo functionality that allows you to revert up to 10 previous operations, helping to correct any errors.

### What devices does bcRPN support?

bcRPN is available for iPhone, iPad, and iPod devices.

### Is bcRPN free to use?

Yes, bcRPN is available for free and does not contain advertisements or in-app purchases.

### How often is bcRPN updated?

The latest version of bcRPN was released on January 29, 2024, indicating active development and updates.

### What is the age rating for bcRPN?

bcRPN has an age rating of 4+, making it suitable for a wide range of users.

## Version history (last 2 releases)

### 2.0 — 2024-01-29

Numbers are left justified during data entry.

### 1.0 — 2022-04-18

No release notes.

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## Related topics

[rpn](https://appshunter.io/ios/topics/rpn) · [rpn calculator free](https://appshunter.io/ios/topics/rpn-calculator-free)

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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 2026-08-02.*