# i41CX vs RPN

The clearest difference is in-app purchases: RPN at none against i41CX's 4. RPN also leads on price ($1.99 vs $7.99) and rating (5.0 vs 4.7). i41CX's advantage is update cadence (every 3 days vs every 3 months) and review sentiment (90% vs 80%). On ads and device support there is nothing between them.

i41CX costs $7.99 and RPN $1.99 up front. i41CX sells 4 one-off in-app purchases. RPN asks for nothing beyond the download.

RPN holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: i41CX has 47 ratings behind it against 9, so its average is the more settled of the two. Written reviews complicate that: 90% of i41CX's written reviews are positive against 80% of RPN's, so the app with the better star average is not the one people write more warmly about.

i41CX ships an update every 3 days, RPN every 3 months. Both last shipped on November 10, 2026.

## The numbers

| Metric | i41CX | RPN |
| --- | --- | --- |
| Price | $7.99 | **$1.99** |
| Rating | [4.7 (47 ratings)](https://appshunter.io/ios/app/i41cx/id292619450/reviews) | **[5.0 (9 ratings)](https://appshunter.io/ios/app/rpn-32-ce/id1082637146/reviews)** |
| Number of ratings | **47** | 9 |
| Positive reviews | **90.5% of reviews** | 80.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 3 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 135 MB | 14 MB |
| Requires iOS | 16.0 | **12.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Antonio Lagana](https://appshunter.io/developer/289068868) | [CuVee Software](https://appshunter.io/developer/424873503) |

## What reviewers say

### i41CX

[App page](https://appshunter.io/ios/app/i41cx/id292619450)

This advanced programmable RPN scientific calculator offers a powerful set of functions and a user-friendly interface. It emulates the functionality of a renowned calculator, with options to unlock advanced features through in-app purchases.

**Highlights:** RPN logic with 4-element stack, Over 300 built-in functions, Programmable up to 2000 lines, User-definable keyboard, Bluetooth keyboard support, Device integration features, Customizable skins and display

**Features:** macOS Compatibility, iPhone Duo support

**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 |


### RPN

[App page](https://appshunter.io/ios/app/rpn-32-ce/id1082637146)

This app is a photo-realistic simulation of a classic scientific calculator, offering advanced programming capabilities beyond the original model. It includes a comprehensive set of mathematical functions and features for easy program management and sharing.

**Highlights:** Photo-realistic calculator simulation, Fully programmable with 99 steps, Extensive scientific and statistical functions, Program library and sharing options, Import and export programs, 44 pre-installed programs

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is i41CX free?

i41CX costs $7.99, and also offers in-app purchases.

### Is RPN free?

RPN costs $1.99, with no in-app purchases.

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

RPN is rated higher. i41CX averages 4.7 out of 5 from 47 ratings, while RPN averages 5.0 from 9 ratings.

### Do i41CX or RPN have ads?

Neither i41CX nor RPN shows ads.

### Which is updated more often, i41CX or RPN?

i41CX ships an update every 3 days, and RPN every 3 months. Most recently, i41CX was updated on November 10, 2026 and RPN on November 10, 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.*