i41CX

🇺🇸 United States
Antonio Lagana  | 
41
ASO score
Text
33/100
Reviews
50/100
Graphic
60/100
Other
0/100
rating
App Rating
4.3
rating
Votes
139
rating
App Age
17y 2m
rating
Last Update
Aug 20, 2025
rating
iAP
$2.99 - 17.99

Compare with Category Top Apps

Metrics
Current App
Category Top Average
Difference
Rating
4.27
4.68
-9%
Number of Ratings (Voted)
139
3.2M
-100%
App Age
17y 2m
7y 11m
+116%
Price
$8
$0
In-app Purchases Price
$10
$71
-85 %
Update Frequency
112d
29d
+292%
Title Length
5
23
-78%
Subtitle Length
8
28
-71%
Description Length
2 202
3 044
-28%
Number of Screenshots
1755
1380
+27 %
Size
372MB
284MB
+31 %

Category Ranking in United States

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Top Dec 03, 2025 Dec 10, 2025
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Top Dec 03, 2025 Dec 10, 2025
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Ranking Keywords in United States

Keywords App Rank
Illustration
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Text ASO

Title (
Characters: 5 of 30
)
i41CX
Subtitle (
Characters: 8 of 30
)
RPN Calc
Description (
Characters: 2202 of 4000
)
i41CX is the same powerful advanced programmable RPN scientific calculator as the highly acclaimed i41CX+ but without the latter’s incredibly advanced capabilities such as the printer, expansion, CAS, etc. It is functionally equivalent to the world-renowned HP-41CX and inherits all of the i41CX+ usability features including extremely responsive and animated key clicks, audible key feedback sounds, optimally spaced keys for accurate input, traditional and upbeat modern diverse set of skins, etc. If you are looking for a powerful programmable RPN scientific calculator but don’t need all of the capabilities of i41CX+ then i41CX is for you. And best of all, if you ever decide that you need the more advanced capabilities of i41CX+ you can enable them using secure in-app purchases right within the app! FEATURES: • RPN logic with a 4 element deep memory stack • 319 main and 124 extended memory registers • Over 300 built-in functions, including nearly 100 functions created specifically for i41CX • Time, calendar, alarm, and stopwatch functions • Rich set of functions and algorithms: numerical, mathematical, statistical, and much more • 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 - Over 2000 lines • User definable keyboard • Ability to operate the calculator using a Bluetooth keyboard • Device integration: external display mirroring, copy and paste, GPS, accelerometer, digital compass, time and date synchronization, and much more • iOS 8 Notification Center widget • Sound support including synthetic tones and interface sounds • Support for calculator skins and optional mini stack display • Adjustable sound volume and display colors • Usage & Examples table with usage tips and examples • Quick reference guide of all built-in functions • Beautiful and clean user interface *********************************************************** A comprehensive FAQ is available at http://alsoftiphone.com/i41CX. Please don't hesitate to use the "Contact Us" link there if you cannot find the answers or information that you seek. Thank you.}
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Visual ASO

Screenshots

Rating & Reviews

Reviews Overview
🧐 Coming Soon…
Rating
4.3
139 voters

Some Latest Reviews

Ricardo C A
29 Sep, 2024
5
Perfeita, dunciona exatamente como minha antiga HP41C!
OstapM
13 Aug, 2024
5
I've been using my original HP41CV since ~ 1980, and just love RPN and the functionality and the history of this groundbreaking calculator. I use an emmulator on my PC, but was challenged finding a good emmulator while on other mobile platforms. This is the first app I purchased once moving to IPhone in 2017 and I it's the only calculator I use. Works just like the original and always brings me great memories, making me smile every time I use it.
nickname 314159-2653590
14 Jun, 2024
5
This is a great program! The interface is so well designed and uses all of the available screen space so that the numbers are readable for this old timer. In the HP tradition, this app exceeds expectations in both quality and performance.
Egste
28 Mar, 2024
5
Para cualquiera que la tenga o la añore. Como llevarla encima.
Be careful !
18 Nov, 2021
5
I had the “real” HP41C when I was at Uni 40 years ago. Still today it is the best, especially with RPN. Having this as such a well developed and supported App is an absolute Godsend ! Very well done.
strandvlooi
26 Nov, 2020
5
It feels so good to be to use my old HP41C again. Had one in Elec Eng university course and have missed it ever since. Well done to the developer and thanks for keeping it maintained.
GunnarN
22 Oct, 2020
5
This app was the main reason for me to choose iPhone over other smartphones. The only feature I am missing is the ability to load and save programs from an external source.
Ituniax
22 Oct, 2020
5
Avec la dernière mise à jour 7.6.3, le programme se lance et disparaît immédiatement. Bug corrigé dans les heures suivantes avec la version 7.6.4. Excellente application.
Harry Killaars
21 Oct, 2020
1
Is it possible that the i41CX+ on IOS14.1 NOT running?

Other

Additional Information
Rating:
4.27
Voted: 139
App Store Link:
Price: 7.99 $
Website:
Email: -
Privacy Policy:
Categories: Productivity, Utilities
Size: 371MB
iAP: 2.99 - 17.99 $
App Age: 17 years 2 months
Release Date: Oct 16, 2008
Last Update: Aug 20, 2025
Version: 7.6.17
Version history
7.6.17
Aug 20, 2025
• Minor bug fixes
7.6.16
Oct 06, 2024
• Minor bug fix
Version history