# i41CX+ vs DB40X

The clearest difference is price: DB40X at Free against i41CX+'s $24.99. i41CX+'s advantage is review sentiment (91% vs 67%) and ratings volume (107 vs 7). On rating, update cadence, ads and in-app purchases there is nothing between them.

DB40X 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 4.7 for DB40X. That said, the two scores are not equally well evidenced: i41CX+ has 107 ratings behind it against 7, 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 67% of DB40X's.

i41CX+ ships an update every 5 weeks, DB40X every 3 weeks. The most recent releases landed on October 14, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | i41CX+ | DB40X |
| --- | --- | --- |
| Price | $24.99 | **Free** |
| Rating | **[4.8 (107 ratings)](https://appshunter.io/ios/app/i41cx-plus/id289068865/reviews)** | [4.7 (7 ratings)](https://appshunter.io/ios/app/db40x/id6624315901/reviews) |
| Number of ratings | **107** | 7 |
| Positive reviews | **91.3% of reviews** | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Monetization | Paid | **Free** |
| Best chart rank | **#107** | — |
| Size | 124 MB | 7 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Antonio Lagana](https://appshunter.io/developer/289068868) | [Christophe de Dinechin](https://appshunter.io/developer/1761608161) |

## What reviewers say

### i41CX+

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

**Currently charting:** #107 Top Paid · Productivity (US App Store)

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


### DB40X

[App page](https://appshunter.io/ios/app/db40x/id6624315901)

A high-precision scientific calculator inspired by the HP48 series, offering arbitrary precision computations, complex numbers, vectors, matrices, and graphing. It supports RPN and algebraic operations, with over 1000 built-in functions and a hyperlinked help system.

**Highlights:** Arbitrary precision computations, RPN and algebraic operations, Complex numbers, vectors, and matrices, Graphing and plotting, Engineering units and conversions, Hyperlinked help system

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is i41CX+ free?

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

### Is DB40X free?

DB40X is free to download, with no in-app purchases.

### Which has better reviews, i41CX+ or DB40X?

i41CX+ is rated higher. i41CX+ averages 4.8 out of 5 from 107 ratings, while DB40X averages 4.7 from 7 ratings.

### Do i41CX+ or DB40X have ads?

Neither i41CX+ nor DB40X shows ads.

### Which is updated more often, i41CX+ or DB40X?

i41CX+ ships an update every 5 weeks, and DB40X every 3 weeks. Most recently, i41CX+ was updated on October 14, 2026 and DB40X on October 3, 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.*