# r.Calc vs Plus42

The clearest difference is rating: Plus42 at 4.9 against r.Calc's 4.0. Plus42 also leads on update cadence (weekly vs every 197 months) and ratings volume (79 vs 3). r.Calc's advantage is price ($0.99 vs $9.99) and iOS requirement (2.2.1 vs 12.0). On review sentiment, ads, in-app purchases and device support there is nothing between them.

r.Calc costs $0.99 and Plus42 $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Plus42 holds the better App Store score, 4.9 against 4.0. That said, the two scores are not equally well evidenced: Plus42 has 79 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 100% of r.Calc's written reviews are positive against 92% of Plus42's, so the app with the better star average is not the one people write more warmly about.

r.Calc ships an update every 197 months, Plus42 weekly. The most recent releases landed on June 10, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | r.Calc | Plus42 |
| --- | --- | --- |
| Price | **$0.99** | $9.99 |
| Rating | [4.0 (3 ratings)](https://appshunter.io/ios/app/rcalc/id291200623/reviews) | **[4.9 (79 ratings)](https://appshunter.io/ios/app/plus42/id1597963622/reviews)** |
| Number of ratings | 3 | **79** |
| Positive reviews | **100.0% of reviews** | 92.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 197 months | **Weekly** |
| Monetization | Paid | **Free** |
| Size | 0 MB | 11 MB |
| Requires iOS | **2.2.1** | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Nicolas Jorand](https://appshunter.io/developer/291200626) | [Thomas Okken](https://appshunter.io/developer/337692632) |

## What reviewers say

### r.Calc

[App page](https://appshunter.io/ios/app/rcalc/id291200623)

A straightforward calculator utilizing Reverse Polish Notation (RPN) for everyday calculations. It offers a four-level visible stack with a total capacity of 100 positions, providing visual feedback on stack fullness. Basic arithmetic operations and stack manipulation functions are included.

**Highlights:** Reverse Polish Notation (RPN) input, Four visible stack levels, 100-position stack capacity, Progress bar for stack fullness, Basic arithmetic operations, Stack swap and recall functions, Vibration feedback for errors

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is r.Calc free?

r.Calc costs $0.99, with no in-app purchases.

### Is Plus42 free?

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

### Which has better reviews, r.Calc or Plus42?

Plus42 is rated higher. r.Calc averages 4.0 out of 5 from 3 ratings, while Plus42 averages 4.9 from 79 ratings.

### Do r.Calc or Plus42 have ads?

Neither r.Calc nor Plus42 shows ads.

### Which is updated more often, r.Calc or Plus42?

r.Calc ships an update every 197 months, and Plus42 weekly. Most recently, r.Calc was updated on June 10, 2026 and Plus42 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.*