# Complex RPN Calculator vs HP41CV

The clearest difference is rating: Complex RPN Calculator at 3.9 against HP41CV's 2.8. Complex RPN Calculator also leads on review sentiment (52% vs 12%) and update cadence (every 5 months vs every 73 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Complex RPN Calculator holds the better App Store score, 3.9 against 2.8. Both are backed by a comparable volume of ratings — 24 and 22 respectively. Written reviews point the same way: 52% of Complex RPN Calculator's written reviews are positive against 12% of HP41CV's.

Complex RPN Calculator ships an update every 5 months, HP41CV every 73 months. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Complex RPN Calculator | HP41CV |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (24 ratings)](https://appshunter.io/ios/app/complex-rpn-calculator/id291826330/reviews)** | [2.8 (22 ratings)](https://appshunter.io/ios/app/hp41cv/id1214637000/reviews) |
| Number of ratings | **24** | 22 |
| Positive reviews | **51.7% of reviews** | 11.8% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 73 months |
| Monetization | Free | Free |
| Size | 1 MB | 8 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [John Coddington](https://appshunter.io/developer/291826333) | [Jurgen Anton Strohmer](https://appshunter.io/developer/1214636999) |

## What reviewers say

### Complex RPN Calculator

[App page](https://appshunter.io/ios/app/complex-rpn-calculator/id291826330)

This scientific calculator utilizes a four-level stack and natively handles complex numbers. It allows users to input and view numbers in both polar and rectangular formats, remembering its state and offering 10 memory locations.

**Highlights:** Complex number support, Four-level stack, Polar and rectangular formats, State persistence, 10 memory locations, Scientific calculations

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- ✅ Great RPN functionality
- ✨ Complex number support
- 🆓 Free to use
- 🚫 No ads or in-app purchases
- 💻 Works on macOS

**What reviewers complain about**

- 🎨 SwiftUI design is ugly
- 🐌 Slow keyboard response
- 🖱️ Clunky operation
- 📉 Complex number operations limited
- ⚠️ Broken on newer iOS versions (historically)

**Reported bugs**

- Mutes other apps when used
- Slow keyboard response after update
- X^3 calculation incorrect for large imaginary numbers
- App crashes on opening/button press (historical iOS 9 issues)
- App starts upside down in landscape on iPad (historical iOS 8 issue)

**Requested features**

- Turn off key click sound
- Customize number display
- See the stack
- Fix slow entry response
- Fix imaginary number calculation (X^3)


### HP41CV

[App page](https://appshunter.io/ios/app/hp41cv/id1214637000)

Experience the functionality of a classic 90s pocket calculator on your iPhone. This app offers UPN calculation with a basic course for new users. Many core functions are available for free, with advanced features offered as optional upgrades.

**Highlights:** HP-41 CV calculator emulation, UPN (Reverse Polish Notation) calculation, Basic UPN course with examples, Core functions available for free, Optional advanced features

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Complex RPN Calculator free?

Complex RPN Calculator is free to download, with no in-app purchases.

### Is HP41CV free?

HP41CV is free to download, with no in-app purchases.

### Which has better reviews, Complex RPN Calculator or HP41CV?

Complex RPN Calculator is rated higher. Complex RPN Calculator averages 3.9 out of 5 from 24 ratings, while HP41CV averages 2.8 from 22 ratings.

### Do Complex RPN Calculator or HP41CV have ads?

Neither Complex RPN Calculator nor HP41CV shows ads.

### Which is updated more often, Complex RPN Calculator or HP41CV?

Complex RPN Calculator ships an update every 5 months, and HP41CV every 73 months. Most recently, Complex RPN Calculator was updated on October 21, 2026 and HP41CV on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*