# Plus42 vs my12c

The clearest difference is price: my12c at Free against Plus42's $9.99. my12c also leads on update cadence (every 3 days vs weekly). Plus42's advantage is in-app purchases (none vs 1) and iOS requirement (15.0 vs 26.0). On ads and device support there is nothing between them.

my12c is free to download; Plus42 costs $9.99 up front. my12c sells 1 one-off in-app purchase. Plus42 asks for nothing beyond the download.

Plus42 ships an update weekly, my12c every 3 days. The most recent releases landed on October 22, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Plus42 | my12c |
| --- | --- | --- |
| 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** | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 3 days** |
| Monetization | Free | — |
| Size | 11 MB | 6 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Thomas Okken](https://appshunter.io/developer/337692632) | [Miroslav Perovic](https://appshunter.io/developer/400748424) |

## 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


### my12c

[App page](https://appshunter.io/ios/app/my12c/id6814496960)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Full App | $9.99 | one-time |


## Frequently asked questions

### Is Plus42 free?

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

### Is my12c free?

my12c is free to download, with in-app purchases available.

### Do Plus42 or my12c have ads?

Neither Plus42 nor my12c shows ads.

### Which is updated more often, Plus42 or my12c?

Plus42 ships an update weekly, and my12c every 3 days. Most recently, Plus42 was updated on October 22, 2026 and my12c on October 13, 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.*