# RPN vs SwiftRPN

The clearest difference is in-app purchases: SwiftRPN at none against RPN's 1. RPN's advantage is update cadence (monthly vs every 14 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. RPN sells 1 one-off in-app purchase. SwiftRPN asks for nothing beyond the download.

RPN ships an update monthly, SwiftRPN every 14 months. The most recent releases landed on October 19, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | RPN | SwiftRPN |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/swiftrpn/id6470951024/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Monthly** | Every 14 months |
| Monetization | Free | — |
| Size | 5 MB | 3 MB |
| Requires iOS | **16.6** | 17.6 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Tomas Stankiewicz Baldassarri](https://appshunter.io/developer/452519243) | [Patrick Gelvin](https://appshunter.io/developer/1573354051) |

## What reviewers say

### RPN

[App page](https://appshunter.io/ios/app/rpn/id452519240)

This utility app functions as a reverse Polish notation calculator. Users input numbers and operations using a stack-based interface to perform calculations. It's designed for straightforward mathematical tasks.

**Highlights:** Reverse Polish Notation (RPN) input, Stack-based operation, Intuitive digit and operation buttons, Clear result display

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stack LCD | $0.49 | one-time |


### SwiftRPN

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

**In-app purchases:** none


## Frequently asked questions

### Is RPN free?

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

### Is SwiftRPN free?

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

### Do RPN or SwiftRPN have ads?

Neither RPN nor SwiftRPN shows ads.

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

RPN ships an update monthly, and SwiftRPN every 14 months. Most recently, RPN was updated on October 19, 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.*