i41CX

Name: i41CX
Price: 7.99 USD
Rating: 4.6 (43 reviews)
Author: Antonio Lagana

By: Antonio Lagana

RPN Calc

Features & Capabilities

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.

User Growth & Download Statistics

App

By:

Antonio Lagana

Rating:

4.60

(43)

Version:

7.6.19 Last updated: 2026-01-28

Version code:

881894298

Creation date:

2008-10-16

Compatible devices:

Size:

371.47MB

Price:

7.99

URLs:

Website ,Privacy policy

Full description:

Source:

Apple Apps Store

Data ingested on:

2026-06-06

Compare stats and ranking:

Ranking

# 206,904 ▼ 455

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Apple app. Please use these information below to contact the Apple app developer.

Developed by:

Antonio Lagana

Apple Apps Store

https://apps.apple.com/us/app/i41cx/id292619450

Website:

http://alsoftiphone.com

User Reviews

i41CX is praised as a near-perfect HP41CX emulator on iOS, delivering authentic look/feel, sturdy usability, portability, and robust RPN programming with ongoing developer support. The main downsides are update-related compatibility across iOS versions and devices, occasional scaling/touch issues, and occasional non-functionality on older hardware. Overall, it's a beloved tool for nostalgia-driven engineering work.

Pros

Faithful HP41CX emulation with authentic look, feel, ports, and nostalgia.
Excellent usability and readability; interface uses the full screen space.
Portable on iPhone/iPad, letting you carry a HP41-like calculator anywhere.
Real programmability and HP41-style RPN features, with built-in/plugin upgrades.
Responsive developer support and ongoing updates that fix issues and add features.

Cons

Update-related compatibility issues across iOS versions and devices, including scaling and touch-point misalignment.
Some updates render the app temporarily unusable on older iPads until fixes are released.
Readability of digits can be challenging on certain displays.

Recent reviews

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.

by ni*****, 2024-06-14

Well done! $/feature/functionality it’s like buying a hand held super computer. Holy cow! Not to mention throw-back value for boomer generation :)

by BL*****, 2022-10-02

I have been using HP calculators since I bought a HP45 in about 1973 With HP mostly out of the Scientific RPN calculator area this app fills the need! Makes me miss my HP41CV I had (that died after many years of heavy use). Super customer service as well.