# Calculator RPN vs Calculator +ㅤ

The clearest difference is price: Calculator +ㅤ at Free against Calculator RPN's $4.99. Calculator +ㅤ also leads on ratings volume (4.6K vs 48). Calculator RPN's advantage is in-app purchases (none vs 6) and ads (none vs shown). On rating, update cadence and iOS requirement there is nothing between them.

Calculator +ㅤ is free to download; Calculator RPN costs $4.99 up front. Calculator +ㅤ sells 6 in-app purchases, starting at $2.99 per 7 days. Calculator RPN asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.7 for Calculator RPN against 4.6 for Calculator +ㅤ. That said, the two scores are not equally well evidenced: Calculator +ㅤ has 4.6K ratings behind it against 48, so its average is the more settled of the two. Written reviews are what separate them: 60% of Calculator RPN's written reviews are positive against 47% of Calculator +ㅤ's.

Calculator RPN ships an update every 3 weeks, Calculator +ㅤ fortnightly. The most recent releases landed on October 22, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Calculator RPN | Calculator +ㅤ |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[4.7 (48 ratings)](https://appshunter.io/ios/app/calculator-rpn/id568690457/reviews)** | [4.6 (4.6K ratings)](https://appshunter.io/ios/app/calculator-plus/id1597933199/reviews) |
| Number of ratings | 48 | **4.6K** |
| Positive reviews | **60.0% of reviews** | 46.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | **Free** | Subscription |
| Size | 16 MB | 55 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | **iPhone, iPad, iPod, Mac, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Benjamin Pisano](https://appshunter.io/developer/1232617402) | [Rocket Apps GmbH](https://appshunter.io/developer/1566586717) |

## What reviewers say

### Calculator RPN

[App page](https://appshunter.io/ios/app/calculator-rpn/id568690457)

This scientific calculator offers Reverse Polish Notation (RPN) for faster calculations. It includes 54 mathematical functions, coordinate conversions, and unit conversions, all within a simple interface.

**Highlights:** RPN calculation mode, 54 mathematical functions, Trigonometry (simple and hyperbolic), Coordinate and unit conversions, Degrees and radians support, Simple interface

**Features:** Apple Watch app

**In-app purchases:** none


### Calculator +ㅤ

[App page](https://appshunter.io/ios/app/calculator-plus/id1597933199)

This app simplifies math with basic, scientific, and fraction calculations. It also features a unique snap-and-scribble function to solve problems from photos. Customize your experience with themes and access a calculation history.

**Highlights:** Snap and Scribble Calculator, Basic Calculator, Scientific Calculator, Fraction Calculator, Currency Converter, Calculation History, Customizable Themes

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Rocket Apps PRO Weekly | $2.99 | per 7 days |
| Rocket Apps PRO Monthly | $4.99 | per month |
| Rocket Apps PRO Yearly | $9.99 | per year |
| Rocket Apps PRO Offer | $19.99 | per year |
| Rocket Apps PRO Yearly | $19.99 | per year |
| Rocket Apps PRO Yearly | $29.99 | per year |

**What reviewers like**

- 👍 Easy to use
- 🚀 Accurate calculations
- 🎨 Excellent visuals
- 💡 Helpful for academic work

**What reviewers complain about**

- 💰 Subscription model too expensive
- 🔍 Decimal entry quirks
- 📺 Too many ads
- 🔒 Locked features behind paywall

**Reported bugs**

- Inaccurate square root calculations
- Compatibility issues on iPad
- Decimal point not recognized

**Requested features**

- Negative number support
- Improved fraction calculator
- Scientific calculator layout
- Option to disable history feature


## Frequently asked questions

### Is Calculator RPN free?

Calculator RPN costs $4.99, with no in-app purchases.

### Is Calculator +ㅤ free?

Calculator +ㅤ is free to download, with in-app purchases available.

### Which has better reviews, Calculator RPN or Calculator +ㅤ?

Calculator RPN is rated higher. Calculator RPN averages 4.7 out of 5 from 48 ratings, while Calculator +ㅤ averages 4.6 from 4.6K ratings.

### Do Calculator RPN or Calculator +ㅤ have ads?

Calculator +ㅤ shows ads; Calculator RPN does not.

### Which is updated more often, Calculator RPN or Calculator +ㅤ?

Calculator RPN ships an update every 3 weeks, and Calculator +ㅤ fortnightly. Most recently, Calculator RPN was updated on October 22, 2026 and Calculator +ㅤ on October 30, 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.*