# Plus42 vs X CalcKits

The clearest difference is price: X CalcKits at Free against Plus42's $9.99. Plus42's advantage is ads (none vs shown) and update cadence (weekly vs every 4 months). On in-app purchases, device support and iOS requirement there is nothing between them.

X CalcKits is free to download; Plus42 costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Plus42 ships an update weekly, X CalcKits every 4 months. The most recent releases landed on October 18, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Plus42 | X CalcKits |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[4.9 (79 ratings)](https://appshunter.io/ios/app/plus42/id1597963622/reviews)** | — |
| Number of ratings | **79** | — |
| Positive reviews | 92.3% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Weekly** | Every 4 months |
| Monetization | Free | — |
| Size | 11 MB | 31 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Thomas Okken](https://appshunter.io/developer/337692632) | [Singxi Limited](https://appshunter.io/developer/1844027284) |

## What reviewers say

### Plus42

[App page](https://appshunter.io/ios/app/plus42/id1597963622)

This advanced scientific calculator simulates the classic HP-42S RPN calculator with enhanced features. It offers algebraic expressions, unit conversions, directories for storage, a larger resizable display, financial functions, and 2D plotting with integral and root finding.

**Highlights:** HP-42S RPN calculator simulation, Algebraic expressions, Attached units and conversions, Program and variable directories, Resizable 8-row, 22-column display, Time value of money and amortization, 2D function plotting with zoom and pan

**Features:** Vision Pro support

**In-app purchases:** none


### X CalcKits

[App page](https://appshunter.io/ios/app/x-calckits/id6757659022)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Plus42 free?

Plus42 costs $9.99, with no in-app purchases.

### Is X CalcKits free?

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

### Do Plus42 or X CalcKits have ads?

X CalcKits shows ads; Plus42 does not.

### Which is updated more often, Plus42 or X CalcKits?

Plus42 ships an update weekly, and X CalcKits every 4 months. Most recently, Plus42 was updated on October 18, 2026 and X CalcKits on October 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.*