# i41CX+ vs WP 31s

The clearest difference is price: WP 31s at Free against i41CX+'s $24.99. WP 31s also leads on review sentiment (100% vs 91%) and iOS requirement (12.0 vs 15.0). i41CX+'s advantage is update cadence (every 5 weeks vs every 10 months) and ratings volume (107 vs 15). On rating, ads, in-app purchases and device support there is nothing between them.

WP 31s is free to download; i41CX+ costs $24.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.8 for i41CX+ against 4.9 for WP 31s. That said, the two scores are not equally well evidenced: i41CX+ has 107 ratings behind it against 15, so its average is the more settled of the two. Written reviews are what separate them: 91% of i41CX+'s written reviews are positive against 100% of WP 31s's.

i41CX+ ships an update every 5 weeks, WP 31s every 10 months. The most recent releases landed on October 14, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | i41CX+ | WP 31s |
| --- | --- | --- |
| Price | $24.99 | **Free** |
| Rating | [4.8 (107 ratings)](https://appshunter.io/ios/app/i41cx-plus/id289068865/reviews) | **[4.9 (15 ratings)](https://appshunter.io/ios/app/wp-31s/id973621300/reviews)** |
| Number of ratings | **107** | 15 |
| Positive reviews | 91.3% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 10 months |
| Monetization | Paid | **Free** |
| Size | 124 MB | 16 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Antonio Lagana](https://appshunter.io/developer/289068868) | [Pascal Meheut](https://appshunter.io/developer/620255097) |

## What reviewers say

### i41CX+

[App page](https://appshunter.io/ios/app/i41cx-plus/id289068865)

This advanced RPN scientific calculator offers workstation-class Computer Algebra System (CAS) capabilities, going beyond traditional replicas. It provides access to an extensive library of modules and programs, enhanced with iOS features, customizable skins, and iCloud support for seamless data management.

**Highlights:** RPN logic with 4-element stack, Extensive memory registers, Over 400 built-in functions, Computer Algebra System (CAS), Virtual thermal printer/plotter, Access to HP-41 module library, Customizable skins and keyboard overlays

**In-app purchases:** none

**What reviewers like**

- 🚀 Fantastic emulation of the original HP41 calculator
- 🔒 Faithful to the original hardware and functionality
- 👍 Includes all the expansion modules and accessories
- 👍 Responsive and never crashes
- 👍 Excellent implementation of RPN and programmability

**What reviewers complain about**

- 🔋 Can drain battery when left on
- 👎 Small button size can lead to mis-taps
- 👎 Slow startup time in some versions

**Reported bugs**

- Issues with the 41Z math module producing garbled output
- Scaling problems with overlays

**Requested features**

- Landscape mode for better button size
- Haptic feedback for button presses
- Ability to load and save programs/modules via cloud/email
- Macros or scripting support


### WP 31s

[App page](https://appshunter.io/ios/app/wp-31s/id973621300)

This app emulates a classic RPN scientific calculator, offering a rich function set for daily use with a simplified interface. It's based on the more complex WP 34s but is designed for easier operation.

**Highlights:** RPN scientific calculator emulation, Rich function set, Simplified, less cluttered keyboard, Based on WP 34s, Available on iOS

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is i41CX+ free?

i41CX+ costs $24.99, with no in-app purchases.

### Is WP 31s free?

WP 31s is free to download, with no in-app purchases.

### Which has better reviews, i41CX+ or WP 31s?

WP 31s is rated higher. i41CX+ averages 4.8 out of 5 from 107 ratings, while WP 31s averages 4.9 from 15 ratings.

### Do i41CX+ or WP 31s have ads?

Neither i41CX+ nor WP 31s shows ads.

### Which is updated more often, i41CX+ or WP 31s?

i41CX+ ships an update every 5 weeks, and WP 31s every 10 months. Most recently, i41CX+ was updated on October 14, 2026 and WP 31s on September 25, 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.*