# my41CX vs RLM

The clearest difference is monetization model: RLM at free against my41CX's free with in-app purchases. RLM also leads on iOS requirement (15.0 vs 26.0). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. my41CX sells 3 in-app purchases, starting at $0.99 per month and RLM sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for my41CX against 5.0 for RLM. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

my41CX ships an update every 2 months, RLM every 4 weeks. The most recent releases landed on October 23, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | my41CX | RLM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/my41cx/id979041950/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/rlm-10cx/id6466089794/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 43.4% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 5 MB | 6 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Miroslav Perovic](https://appshunter.io/developer/400748424) | [R.L.M. Software](https://appshunter.io/developer/289639238) |

## What reviewers say

### 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


### RLM

[App page](https://appshunter.io/ios/app/rlm-10cx/id6466089794)

This scientific calculator offers a comprehensive suite of tools for finance, business, statistics, and complex scientific calculations. It emulates a classic calculator while leveraging modern iOS device capabilities for ease of use and advanced functions.

**Highlights:** Finance and Business calculations, Date and Time interval calculations, Advanced Statistics and Curve Fitting, Complex Numbers and 3D Vectors, Unit and Currency Conversions, Equation Solver, Programmable functions

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Purchase | $9.99 | one-time |


## Frequently asked questions

### Is my41CX free?

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

### Is RLM free?

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

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

my41CX and RLM are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do my41CX or RLM have ads?

Neither my41CX nor RLM shows ads.

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

my41CX ships an update every 2 months, and RLM every 4 weeks. Most recently, my41CX was updated on October 23, 2026 and RLM on September 30, 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.*