# RPN Calculus vs SwiftRPN

The clearest difference is price: SwiftRPN at Free against RPN Calculus's $1.99. SwiftRPN also leads on rating (5.0 vs 4.0). RPN Calculus's advantage is update cadence (every 4 months vs every 14 months) and iOS requirement (12.0 vs 17.6). On ratings volume, ads, in-app purchases and device support there is nothing between them.

SwiftRPN is free to download; RPN Calculus costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SwiftRPN holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

RPN Calculus ships an update every 4 months, SwiftRPN every 14 months. The most recent releases landed on October 14, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | RPN Calculus | SwiftRPN |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/rpn-calculus/id374359458/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/swiftrpn/id6470951024/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 14 months |
| Monetization | Paid | — |
| Size | 11 MB | 3 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Thomas Braun](https://appshunter.io/developer/296553965) | [Patrick Gelvin](https://appshunter.io/developer/1573354051) |

## What reviewers say

### RPN Calculus

[App page](https://appshunter.io/ios/app/rpn-calculus/id374359458)

This scientific calculator app for iPad offers a clean RPN interface with basic and advanced functions. It supports high precision calculations and provides an extensive, user-extendable database of scientific constants.

**Highlights:** RPN (Reverse Polish Notation) interface, Basic and advanced mathematical functions, High precision calculations (up to 15 digits), Extensive scientific constant database, User-extendable constant database, Memory space for values

**In-app purchases:** none


### SwiftRPN

[App page](https://appshunter.io/ios/app/swiftrpn/id6470951024)

**In-app purchases:** none


## Frequently asked questions

### Is RPN Calculus free?

RPN Calculus costs $1.99, with no in-app purchases.

### Is SwiftRPN free?

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

### Which has better reviews, RPN Calculus or SwiftRPN?

SwiftRPN is rated higher. RPN Calculus averages 4.0 out of 5 from 1 ratings, while SwiftRPN averages 5.0 from 1 ratings.

### Do RPN Calculus or SwiftRPN have ads?

Neither RPN Calculus nor SwiftRPN shows ads.

### Which is updated more often, RPN Calculus or SwiftRPN?

RPN Calculus ships an update every 4 months, and SwiftRPN every 14 months. Most recently, RPN Calculus was updated on October 14, 2026 and SwiftRPN on October 24, 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.*