# my41CX vs HP

my41CX and HP both sit at 5.0 stars, but that hides the real split: 100% of HP's written reviews are positive against 43% of my41CX's. HP also leads on in-app purchases (none vs 3) and update cadence (every 11 days vs every 2 months). my41CX's advantage is device support (3 vs 1). On price, rating and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for my41CX against 5.0 for HP. That said, the two scores are not equally well evidenced: HP has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 43% of my41CX's written reviews are positive against 100% of HP's.

my41CX ships an update every 2 months, HP every 11 days. The most recent releases landed on September 26, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | my41CX | HP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/my41cx/id979041950/reviews) | [5.0 (5 ratings)](https://appshunter.io/ios/app/hp-35/id6738010641/reviews) |
| Number of ratings | 1 | **5** |
| Positive reviews | 43.4% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 11 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 5 MB | 2 MB |
| Requires iOS | 26.0 | **17.2** |
| Devices | **iPhone, iPad, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Miroslav Perovic](https://appshunter.io/developer/400748424) | [Enrique Haro](https://appshunter.io/developer/1778874870) |

## 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


### HP

[App page](https://appshunter.io/ios/app/hp-35/id6738010641)

Emulates classic Hewlett Packard RPN scientific calculators from the 1970s. Experience the original HP-35, HP-45, and HP-21 models on your iPhone.

**Highlights:** RPN calculator emulation, HP-35 model, HP-45 model, HP-21 model, Classic scientific calculator interface

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

**In-app purchases:** none


## Frequently asked questions

### Is my41CX free?

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

### Is HP free?

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

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

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

### Do my41CX or HP have ads?

Neither my41CX nor HP shows ads.

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

my41CX ships an update every 2 months, and HP every 11 days. Most recently, my41CX was updated on September 26, 2026 and HP on September 21, 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.*