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my41CX

my41CX

HP-41 Microcode Emulator

2 ratings
53 reviews
📚 Education
🔧 Utilities
Free
In-App Purchases

Details

  • Released
  • Updated
  • April 1, 2015
  • June 27, 2026

Developer

Miroslav Perovic
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🧾$0.99 - $19.99
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About

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.

✓True microcode emulation
✓Modern user interface
✓Expandable with ROM modules
✓Built-in documentation
✓100% hardware-accurate behavior
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What's New in my41CX

3.0.5

June 27, 2026

All documentation is now free to read! • Every HP-41 manual and reference is now open to everyone — no subscription needed to read them. • Free users can keep 2 documents downloaded at a time. Upgrade to Premium for an unlimited offline library. • Subscription handling improvements and minor fixes. Thanks for using my41CX!

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Subscription plans

Monthly

Monthly Premium

$0.991 Month
How to cancel my41CX subscription ⁉️
3

In-App Purchases

$19.99

Unlock Full App

Unlocks all features and modules.

User reviews

Most RecentHighest RatedLowest Rated

An excellent emulation of a classic calculator

This is a beautifully designed emulation of the HP 41C, 41 CV, and 41CX. The look and feel is just like the real calculator and the functionality is perfect.
fred654654fred654654

Amazing

The first 'program' I ever wrote was on one of these calculators. As a challenge and over 40 years later I tried to solve Project Euler's 1st problem with this emulator... Done! Brilliant.

Works perfectly on my phone. Looks like it will run on my iPad too, although the icon seems to be different.

Thanks, Love it
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AngryBirdsCausesBigExpenseLOLAngryBirdsCausesBigExpenseLOL

Best Calculator App Ever

I have used and RPN calculator since college and for years used a 41CX. This calculator is the best version I have found for running on my iPhone.
LancDecLancDec

i feel this is severely underrated

Great emulation of 41c* calculators, haven’t used it in real life, but came around to love it.
ShatalTrubaShatalTruba

Buggy

Can't get this to work on my Mac. I have reset the app, but it will not allow me to enter anything via the keyboard, so it makes it sort of useless.
PerrybucsdadPerrybucsdad
See 48 more reviews

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FAQ

What does the my41CX app do?

The my41CX app is a highly accurate emulator of the legendary HP-41CX programmable calculator. It provides full microcode-level emulation of the original NUT processor, ensuring 100% fidelity to the original hardware's behavior.

What are the key features of my41CX?

Key features include true microcode emulation for authentic hardware behavior, a modern interface designed for current devices, the ability to load external ROM modules to extend functionality, and integrated documentation for easy reference.

Is my41CX free to use?

The application is free to download and use. However, it offers in-app purchases, which may be used to unlock additional features or content, as indicated by the 'free with in-app purchases' monetization model.

Who is the target audience for my41CX?

This app is designed for professionals such as engineers, students, and scientists, as well as hobbyists and anyone who has an appreciation for the sophisticated design and functionality of the original HP-41CX calculator.

Can I expand the functionality of the emulator?

Yes, the emulator supports the expansion of its functionality through ROM modules, mirroring the capabilities of the original HP-41CX hardware. This allows users to load external ROMs to access additional features and programs.