# Free42 vs my41CX

The clearest difference is review sentiment: Free42 at 94% against my41CX's 43%. Free42 also leads on in-app purchases (none vs 3) and ratings volume (287 vs 1). my41CX's advantage is rating (5.0 vs 4.8). On price, ads and device support there is nothing between them.

Both are free to download. my41CX sells 3 in-app purchases, starting at $0.99 per month. Free42 asks for nothing beyond the download.

my41CX holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Free42 has 287 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 94% of Free42's written reviews are positive against 43% of my41CX's, so the app with the better star average is not the one people write more warmly about.

Free42 ships an update every 9 days, my41CX every 2 months. The most recent releases landed on October 26, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Free42 | my41CX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (287 ratings)](https://appshunter.io/ios/app/free42/id337692629/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/my41cx/id979041950/reviews)** |
| Number of ratings | **287** | 1 |
| Positive reviews | **94.4% of reviews** | 43.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 2 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 9 MB | 5 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Thomas Okken](https://appshunter.io/developer/337692632) | [Miroslav Perovic](https://appshunter.io/developer/400748424) |

## What reviewers say

### Free42

[App page](https://appshunter.io/ios/app/free42/id337692629)

This application is a faithful re-implementation of the HP-42S scientific calculator and its associated printer. It offers full functionality without requiring original HP ROM images and is an open-source project.

**Highlights:** HP-42S calculator simulation, HP-82240 printer simulation, Open source project, No HP ROM required, Complete rewrite

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Faithful reproduction of HP42S
- 👍 Identical to physical calculator
- 👍 Runs all original programs
- 👍 Convenient to have on phone
- 👍 Haptic feedback on button presses

**What reviewers complain about**

- 🐛 Screen not filling entire display on newer devices
- 🔇 Configurable key click sound missing
- 🔇 Lack of loud click sound feedback

**Reported bugs**

- Occasional issues with Solver function
- Store and Recall functions not working properly

**Requested features**

- Display all registers (X, Y, Z, T, Last X) simultaneously
- Ability to share/transfer programs between devices
- Improved use of screen real estate on larger displays


### my41CX

[App page](https://appshunter.io/ios/app/my41cx/id979041950)

Experience the most accurate HP-41CX calculator emulation. This app provides full microcode-level emulation of the original NUT processor, ensuring 100% hardware-accurate behavior. It features a modern interface, expandable ROM modules, and built-in documentation for a classic yet contemporary user experience.

**Highlights:** True microcode emulation, Modern user interface, Expandable with ROM modules, Built-in documentation, 100% hardware-accurate behavior

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $0.99 | per month |
| Yearly Premium | $9.99 | per year |
| Unlock Full App | $19.99 | one-time |

**What reviewers like**

- 👍 Excellent emulation of HP calculators
- ✨ Faithful look and feel
- 💯 Perfect functionality
- 🚀 Works perfectly on phones/iPads
- 💡 Great for RPN calculator users

**What reviewers complain about**

- 🐛 Buggy on Mac
- 🤏 Small characters on buttons
- 🐛 Locks up when running programs
- 🐛 Crashes under iOS 13.2.3
- 🐛 Application quits after touching screen

**Reported bugs**

- Cannot enter anything via keyboard on Mac
- Locks up when running a program
- Crashes under IOS 13.2.3
- Application quits after touching screen
- Keys 'V' and 'W' inverted when ALPHA mode is switched on

**Requested features**

- Larger buttons
- Option for tactile/Haptic feedback for keys
- Option for beep sound
- Instructions for mod files
- Better Mac UI


## Frequently asked questions

### Is Free42 free?

Free42 is free to download, with no in-app purchases.

### Is my41CX free?

my41CX is free to download, with in-app purchases available.

### Which has better reviews, Free42 or my41CX?

my41CX is rated higher. Free42 averages 4.8 out of 5 from 287 ratings, while my41CX averages 5.0 from 1 ratings.

### Do Free42 or my41CX have ads?

Neither Free42 nor my41CX shows ads.

### Which is updated more often, Free42 or my41CX?

Free42 ships an update every 9 days, and my41CX every 2 months. Most recently, Free42 was updated on October 26, 2026 and my41CX on October 23, 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.*