---
title: "i41CX+ - Reviews, Revenue and Downloads in United States | Apple App Store"
description: "i41CX+ is an advanced programmable and expandable RPN scientific calculator with a virtual thermal printer/plotter and workstation-class CAS capabilities that is far beyond a mere replica of the origi"
---

# i41CX+ — United States
> RPN Calc with Printer and CAS

![i41CX+ App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/b1/28/43/b1284302-368d-18c1-c7e3-ae70e0f8f1d6/AppIcon-0-0-1x_U007emarketing-0-8-0-85-220.png/434x0w.png)

**Developer:** [Antonio Lagana](https://apptail.io/developer/antonio-lagana-uoG)
**Category:** Productivity
**Rating:** 4.8/5 (108 ratings)
**Price:** $24.99
**Bundle ID:** com.alsoftware.i41CXp
**Store:** Apple App Store
**Country:** United States
**Version:** 7.7.0 (released 2026-10-23)
**Original Release:** 2019-02-01
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id289068865)
**AppTail Page:** [https://apptail.io/app/i41cx-blzc/united-states](https://apptail.io/app/i41cx-blzc/united-states)

## i41CX+ Description
i41CX+ is an advanced programmable and expandable RPN scientific calculator with a virtual thermal printer/plotter and workstation-class CAS capabilities that is far beyond a mere replica of the original.  In addition to being functionally equivalent to the world-renowned HP-41CX and providing access to its entire library of modules and programs, i41CX+ is enhanced with iOS and hardware features, keyboard overlays, rich set of import and export capabilities, traditional and upbeat diverse set of skins, complete color control, iCloud support, and much more.

The i41CX+ CAS is a full implementation of REDUCE.  It's like having Mathematica or the computational engine of Wolfram Alpha in your pocket and, best of all, it runs natively so no internet connection is required.  The CAS is fully programmable and provides the ability to reuse previous results in computations.  Moreover, the CAS has full access to the calculator registers so it is possible to combine RPN programs with CAS programs.

This is the finest and most powerful scientific/engineering/financial calculator for iOS devices bar none.

CALCULATOR FEATURES:
• RPN logic with a 4 element deep memory stack
• 319 main and 600 extended memory registers
• Over 400 built-in functions, including over 100 functions created specifically for i41CX+
• Time, calendar, alarm, and stopwatch functions
• Four module ports provide access to HP-41 expansion pacs
• Rich set of functions and algorithms: numerical, mathematical, statistical, complex, matrix, numerical integration, curve fitting, solutions to equations, and much more
• Powerful, flexible, and programmable Computer Algebra System (CAS) supporting symbolic, arbitrary precision, scalar, vector and matrix algebra calculations, 2D/3D plotting, and much more
• Full-screen text editor with configurable font style and size, color scheme, a user configurable macro keyboard, and a numerical keyboard
• Access to the entire HP-41 library of solutions for science, mathematics, statistics, engineering, business, financial, surveying, medicine, real estate, and many other domains
• Programmable - virtually unlimited number of lines
• User definable keyboard
• Ability to operate the calculator using a Bluetooth keyboard
• Device integration: external display mirroring, copy and paste, in-app mail, system keyboard, GPS, accelerometer, digital compass, time and date synchronization, AirPrint, and much more
• Virtually unlimited data and program storage capacity using the device's flash memory for local storage
• Import/export data, programs, overlays, modules, etc. via the web, email, and iTunes file sharing
• iCloud syncing of files and preference settings
• iOS 8 Notification Center widget
• 43 available keyboard overlays and support for user created overlays
• Sound support including synthetic tones and interface sounds
• Support for calculator skins and optional mini stack display
• Adjustable calculator speed, sound volume, and display colors
• Usage & Examples table with usage tips and examples
• Quick Reference Guide of all built-in functions
• CAS Quick Reference with all built-in functions, operators, switches, and packages
• Beautiful and clean user interface

PRINTER FEATURES:
• Support for printing, plotting, graphics, and special characters
• User configurable and programmable print color
• Export printer output via email, clipboard, or AirPrint
• Ability to save a JPEG image of the paper roll to the device's photo album

***********************************************************
A comprehensive FAQ and Mini-Manual are available at   Please don't hesitate to use the "Contact Us" link there if you cannot find the answers or information that you seek.  Thank you.

## i41CX+ Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/Purple123/v4/44/2e/5e/442e5ea6-00ec-3d84-3d6d-07926e3fd29a/mzl.fpkxeonw.png/640x960.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/Purple113/v4/ca/48/3f/ca483f1b-2d73-0c21-bdb0-7d2d93e1b315/mzl.btirbgwo.png/640x960.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/Purple123/v4/6f/ed/4d/6fed4d91-d8f6-7817-3cd3-2d2c9be80007/mzl.dumgklhj.png/640x960.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/Purple113/v4/32/29/3e/32293e1f-e1dd-86ae-25f0-06580d1a05f1/mzl.bzthyedn.png/640x960.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/Purple113/v4/83/63/42/83634234-dea8-8e66-5424-dd15d0482fd5/mzl.aluqajjn.png/640x960.png)

## i41CX+ Rating Breakdown in United States
- 5 stars: 100 (93%)
- 4 stars: 2 (2%)
- 3 stars: 1 (1%)
- 2 stars: 4 (4%)
- 1 stars: 1 (1%)

## i41CX+ Reviews in United States

### ***** "This calculator is amazing"
This is the best of the best !
-- Cad/Cam Warrior, 2025-04-21

### ***** "Physicist at Large"
I cannot rave enough about the i41CX+ app. I have a real hp41CV from college and grad school days (mint condition). I use it rarely so that it doesn't wear out. First HP I owned was a model 67 and I was hooked. This 41cx app keeps the entire 41 product and accessories, and then some, in my pocket. Couldn't be more happy with the performance and user experience. Well done !! Please keep it going. It's bad enough HP has abandon these gems.  I'd like to know that this app will remain for years to come. Thanks for the great work.
-- AI Architect, 2025-03-14

### ***** "Fantastic App"
If you loved the calculator, you’ll love this app. Developer is maintaining it faithfully too. Thanks!
-- KimH-NY, 2024-10-06

### ***** "Absolute best"
I have been using this calculator for years - it is incredibly helpful in my work… it is perfectly implemented, mimics the original HP41 calculator (I still have it) but with this I have it with me everywhere. I hope the developer will keep this app going for a very long time! Thanks for this incredible calculator!
-- SloMo, 2024-09-20

### ***** "Best and most useful app I have ever purchased!"
Amazing!  The best calculator in history fully replicated for the iPhone.   I bought it when it was first introduced and it has been used daily ever since! The author has kept it current and support is great!
-- FleetCmd, 2024-04-26

### ***** "Amazing and useful and fun"
I used an HP41c in college, and found it so useful and intuitive. All these decades later, I LOVE this app. It brings back some great memories, but it’s mostly VERY useful.

I also love how exactly it replicates the HP41c experience! The look is perfect and I smile every time I use it.

I’ve never had a problem with its functionality either.

100% recommended!!!
-- John-_-D, 2023-03-18

### ***** "Great app for a great Calculator"
This is truly a great app that mimics a great calculator. The only thing missing is the awesome key feel of the originals. If you were an engineer or a scientist anytime in the late 80s or 90s a 41 CX or CV was your trusted problem solving tool. If you tried synthetic programming to get the most out of your CX you will like this app. Full access to all the expansion modules you couldn’t afford back in the day, are available. 

** Note for developer please make this available for Macs running Monterey**
-- erikgj, 2022-05-28

### ***** "Great!"
I still use a 41cv and 42cx; there has never been anything else comparable.  Very pleased to find this excellent app for the phone; highly recommended!  

As an aside, I paid over $500 for the cv in Spain in 1981 and it still works.
-- Gator867, 2022-05-22

### ***** "Key Clicks"
Key clicks suddenly stoped working, only on I41 app?

Running latest version on iOS 14.7.1
-- DAVEOFFUTT, 2021-08-04

### *---- "The 41Z module is hopelessly BROKEN"
Loaded the complex math module and wasting my time it only produces garbled gibberish. ^IM/AG is not working. The ZSTACK is broken. This module is not functional and needs help
-- ny6u, 2021-05-20

[View all i41CX+ reviews and detailed analytics on AppTail](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=reviews)


## i41CX+ Store Rankings
| Chart | Country | Category | Rank |
|-------|---------|----------|------|
| Top Paid | Ecuador | Productivity | #105 |
| Top Paid | Belgium | Productivity | #106 |
| Top Paid | Switzerland | Productivity | #109 |
| Top Paid | Austria | Productivity | #118 |
| Top Paid | France | Productivity | #120 |
| Top Paid | Mexico | Productivity | #120 |
| Top Paid | South Africa | Productivity | #122 |
| Top Paid | Chile | Productivity | #124 |
| Top Paid | Sweden | Productivity | #128 |
| Top Paid | Italy | Productivity | #135 |
| Top Paid | Norway | Productivity | #137 |
| Top Paid | Greece | Productivity | #148 |
| Top Paid | Portugal | Productivity | #154 |
| Top Paid | Argentina | Productivity | #155 |
| Top Paid | Spain | Productivity | #156 |
| Top Paid | Denmark | Productivity | #166 |
| Top Paid | Netherlands | Productivity | #169 |
| Top Paid | Brazil | Productivity | #177 |
| Top Paid | New Zealand | Productivity | #189 |
| Top Paid | Canada | Productivity | #211 |
| Top Paid | Germany | Productivity | #219 |
| Top Paid | Czechia | Productivity | #220 |
| Top Paid | Australia | Productivity | #227 |
| Top Paid | Colombia | Productivity | #242 |
| Top Paid | Ireland | Productivity | #242 |


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## i41CX+ Available In
- [United States](https://apptail.io/app/i41cx-blzc/united-states)
- [Germany](https://apptail.io/app/i41cx-blzc/germany)
- [United Kingdom](https://apptail.io/app/i41cx-blzc/united-kingdom)
- [France](https://apptail.io/app/i41cx-blzc/france)
- [Switzerland](https://apptail.io/app/i41cx-blzc/switzerland)
- [Canada](https://apptail.io/app/i41cx-blzc/canada)
- [Australia](https://apptail.io/app/i41cx-blzc/australia)
- [Netherlands](https://apptail.io/app/i41cx-blzc/netherlands)
- [Italy](https://apptail.io/app/i41cx-blzc/italy)
- [Japan](https://apptail.io/app/i41cx-blzc/japan)
- [Spain](https://apptail.io/app/i41cx-blzc/spain)
- [Belgium](https://apptail.io/app/i41cx-blzc/belgium)
- [Mexico](https://apptail.io/app/i41cx-blzc/mexico)
- [Sweden](https://apptail.io/app/i41cx-blzc/sweden)
- [Austria](https://apptail.io/app/i41cx-blzc/austria)
- [Brazil](https://apptail.io/app/i41cx-blzc/brazil)
- [Russia](https://apptail.io/app/i41cx-blzc/russia)
- [Denmark](https://apptail.io/app/i41cx-blzc/denmark)
- [China](https://apptail.io/app/i41cx-blzc/china)
- [South Africa](https://apptail.io/app/i41cx-blzc/south-africa)
- [Chile](https://apptail.io/app/i41cx-blzc/chile)
- [Peru](https://apptail.io/app/i41cx-blzc/peru)
- [Norway](https://apptail.io/app/i41cx-blzc/norway)
- [Ecuador](https://apptail.io/app/i41cx-blzc/ecuador)
- [Czechia](https://apptail.io/app/i41cx-blzc/czechia)
- [Portugal](https://apptail.io/app/i41cx-blzc/portugal)
- [Greece](https://apptail.io/app/i41cx-blzc/greece)
- [Ireland](https://apptail.io/app/i41cx-blzc/ireland)
- [India](https://apptail.io/app/i41cx-blzc/india)
- [Colombia](https://apptail.io/app/i41cx-blzc/colombia)
- [Finland](https://apptail.io/app/i41cx-blzc/finland)
- [Taiwan](https://apptail.io/app/i41cx-blzc/taiwan)
- [Luxembourg](https://apptail.io/app/i41cx-blzc/luxembourg)
- [Saudi Arabia](https://apptail.io/app/i41cx-blzc/saudi-arabia)
- [Philippines](https://apptail.io/app/i41cx-blzc/philippines)
- [Singapore](https://apptail.io/app/i41cx-blzc/singapore)
- [New Zealand](https://apptail.io/app/i41cx-blzc/new-zealand)
- [Hungary](https://apptail.io/app/i41cx-blzc/hungary)
- [Türkiye](https://apptail.io/app/i41cx-blzc/turkey)
- [Mali](https://apptail.io/app/i41cx-blzc/mali)
- [Argentina](https://apptail.io/app/i41cx-blzc/argentina)
- [Azerbaijan](https://apptail.io/app/i41cx-blzc/azerbaijan)
- [Brunei](https://apptail.io/app/i41cx-blzc/brunei)
- [Belarus](https://apptail.io/app/i41cx-blzc/belarus)
- [Dominican Republic](https://apptail.io/app/i41cx-blzc/dominican-republic)
- [Algeria](https://apptail.io/app/i41cx-blzc/algeria)
- [Estonia](https://apptail.io/app/i41cx-blzc/estonia)
- [Egypt](https://apptail.io/app/i41cx-blzc/egypt)
- [Hong Kong SAR China](https://apptail.io/app/i41cx-blzc/hong-kong)
- [Croatia](https://apptail.io/app/i41cx-blzc/croatia)
- [Indonesia](https://apptail.io/app/i41cx-blzc/indonesia)
- [Israel](https://apptail.io/app/i41cx-blzc/israel)
- [Iceland](https://apptail.io/app/i41cx-blzc/iceland)
- [South Korea](https://apptail.io/app/i41cx-blzc/south-korea)
- [Kuwait](https://apptail.io/app/i41cx-blzc/kuwait)
- [Kazakhstan](https://apptail.io/app/i41cx-blzc/kazakhstan)
- [Lebanon](https://apptail.io/app/i41cx-blzc/lebanon)
- [Lithuania](https://apptail.io/app/i41cx-blzc/lithuania)
- [Madagascar](https://apptail.io/app/i41cx-blzc/madagascar)
- [North Macedonia](https://apptail.io/app/i41cx-blzc/north-macedonia)
- [United Arab Emirates](https://apptail.io/app/i41cx-blzc/united-arab-emirates)
- [Malaysia](https://apptail.io/app/i41cx-blzc/malaysia)
- [Nigeria](https://apptail.io/app/i41cx-blzc/nigeria)
- [Pakistan](https://apptail.io/app/i41cx-blzc/pakistan)
- [Poland](https://apptail.io/app/i41cx-blzc/poland)
- [Romania](https://apptail.io/app/i41cx-blzc/romania)
- [Slovenia](https://apptail.io/app/i41cx-blzc/slovenia)
- [Slovakia](https://apptail.io/app/i41cx-blzc/slovakia)
- [Thailand](https://apptail.io/app/i41cx-blzc/thailand)
- [Tunisia](https://apptail.io/app/i41cx-blzc/tunisia)
- [Ukraine](https://apptail.io/app/i41cx-blzc/ukraine)
- [Vietnam](https://apptail.io/app/i41cx-blzc/vietnam)

---

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