# Calculator + vs Calculator RPN

The clearest difference is price: Calculator + at Free against Calculator RPN's $4.99. Calculator + also leads on ratings volume (10K vs 48) and review sentiment (85% vs 60%). Calculator RPN's advantage is in-app purchases (none vs 12) and ads (none vs shown). On rating there is nothing between them.

Calculator + is free to download; Calculator RPN costs $4.99 up front. Calculator + sells 12 in-app purchases, starting at $4.99 per month. Calculator RPN asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.6 for Calculator + against 4.7 for Calculator RPN. That said, the two scores are not equally well evidenced: Calculator + has 10K ratings behind it against 48, so its average is the more settled of the two. Written reviews are what separate them: 85% of Calculator +'s written reviews are positive against 60% of Calculator RPN's.

Calculator + ships an update every 5 days, Calculator RPN every 3 weeks. The most recent releases landed on November 1, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Calculator + | Calculator RPN |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | [4.6 (10K ratings)](https://appshunter.io/ios/app/calculator-plus/id351815470/reviews) | **[4.7 (48 ratings)](https://appshunter.io/ios/app/calculator-rpn/id568690457/reviews)** |
| Number of ratings | **10K** | 48 |
| Positive reviews | **84.9% of reviews** | 60.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 5 days** | Every 3 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 50 MB | 16 MB |
| Requires iOS | 16.4 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [xNeat.com](https://appshunter.io/developer/327498295) | [Benjamin Pisano](https://appshunter.io/developer/1232617402) |

## What reviewers say

### Calculator +

[App page](https://appshunter.io/ios/app/calculator-plus/id351815470)

This app offers a free basic and scientific calculator with an intuitive interface. It supports fractions, percentages, and advanced editing. Optional upgrades provide specialized calculators for fractions with units, polynomial and linear equation solving, graphing, and geometric shapes.

**Highlights:** Free basic and scientific calculator, Intuitive interface with equation and result display, Fraction and percent support, Advanced editing capabilities, Polynomial and linear equation solver, Graphing calculator, Unit conversion and geometric calculators

**Features:** Vision Pro support, iPhone Duo support

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Scientific Calculator | $4.99 | per month |
| Calculator | $39.99 | per year |
| Linear Calculator | $2.99 | one-time |
| Factoring Calculator | $2.99 | one-time |
| Handwriting Calculator | $2.99 | one-time |
| Currency Converter | $2.99 | one-time |
| Themes Pack | $2.99 | one-time |
| Graphing Calculator | $3.99 | one-time |
| Fraction Calculator | $3.99 | one-time |
| Scientific Calculator | $4.99 | one-time |
| Calculator Plus | $4.99 | one-time |
| Calculator | $16.99 | one-time |

**What reviewers like**

- 👍 Great features and easy to use
- 👍 Efficient and quick
- 👍 Versatile, functional calculator
- 👍 Fantastic, easy to use app
- 👍 Awesome calculator app

**What reviewers complain about**

- 🐛 New updated layout is awful
- 🐛 App is now terrible
- 🔒 Paying customer screwed over by update
- 🔒 Now timed trial, no free w/ads version
- 🔒 Not honest

**Reported bugs**

- Fraction calculator has TWO subtraction buttons and NO division button
- Decimals seem to be changed to fraction with no apparent way of changing it back
- Functionality is dropped by forcing you to the main menu every time you open it
- Currency converter broken
- Login screen freezes

**Requested features**

- Add mod function
- Add commas
- Add 1/x function
- Support for Retina Display
- Add number 4 with two lines


### 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


## Frequently asked questions

### Is Calculator + free?

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

### Is Calculator RPN free?

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

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

Calculator RPN is rated higher. Calculator + averages 4.6 out of 5 from 10K ratings, while Calculator RPN averages 4.7 from 48 ratings.

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

Calculator + shows ads; Calculator RPN does not.

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

Calculator + ships an update every 5 days, and Calculator RPN every 3 weeks. Most recently, Calculator + was updated on November 1, 2026 and Calculator RPN on October 22, 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.*