# i41CX vs DB40X

The clearest difference is price: DB40X at Free against i41CX's $7.99. DB40X also leads on in-app purchases (none vs 4). i41CX's advantage is review sentiment (90% vs 67%) and chart position (#131 vs unranked). On rating, update cadence, ads and device support there is nothing between them.

DB40X is free to download; i41CX costs $7.99 up front. i41CX sells 4 one-off in-app purchases. DB40X asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.6 for i41CX against 4.7 for DB40X. That said, the two scores are not equally well evidenced: i41CX has 45 ratings behind it against 7, so its average is the more settled of the two. Written reviews are what separate them: 90% 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 17, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | i41CX | DB40X |
| --- | --- | --- |
| Price | $7.99 | **Free** |
| Rating | [4.6 (45 ratings)](https://appshunter.io/ios/app/i41cx/id292619450/reviews) | **[4.7 (7 ratings)](https://appshunter.io/ios/app/db40x/id6624315901/reviews)** |
| Number of ratings | **45** | 7 |
| Positive reviews | **90.5% of reviews** | 66.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | **#131** | — |
| Size | 135 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/id292619450)

**Currently charting:** #131 Top Paid · Productivity (US App Store)

This app offers a powerful RPN scientific calculator experience, functionally equivalent to a renowned model. It provides extensive memory registers, over 300 built-in functions, and programmability. Advanced features can be unlocked via in-app purchases.

**Highlights:** RPN logic with 4-element stack, 319 main and 124 extended memory registers, Over 300 built-in functions, Programmable up to 2000 lines, User-definable keyboard, Bluetooth keyboard support, Device integration features

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Overlays Upgrade | $2.99 | one-time |
| Printer Upgrade | $3.99 | one-time |
| CAS Upgrade | $7.99 | one-time |
| i41CX+ Features Upgrade | $17.99 | one-time |


### 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 $7.99, and also offers in-app purchases.

### Is DB40X free?

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

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

DB40X is rated higher. i41CX averages 4.6 out of 5 from 45 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 17, 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.*