# r.Calc vs SwiftRPN

The clearest difference is price: SwiftRPN at Free against r.Calc's $0.99. SwiftRPN also leads on rating (5.0 vs 4.0) and update cadence (every 14 months vs every 197 months). r.Calc's advantage is ratings volume (3 vs 1) and iOS requirement (2.2.1 vs 17.6). On ads, in-app purchases and device support there is nothing between them.

SwiftRPN is free to download; r.Calc costs $0.99 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 — 3 and 1 respectively.

r.Calc ships an update every 197 months, SwiftRPN every 14 months. The most recent releases landed on June 10, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | r.Calc | SwiftRPN |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [4.0 (3 ratings)](https://appshunter.io/ios/app/rcalc/id291200623/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/swiftrpn/id6470951024/reviews)** |
| Number of ratings | **3** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 197 months | **Every 14 months** |
| Monetization | Paid | — |
| Size | 0 MB | 3 MB |
| Requires iOS | **2.2.1** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Nicolas Jorand](https://appshunter.io/developer/291200626) | [Patrick Gelvin](https://appshunter.io/developer/1573354051) |

## 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


### SwiftRPN

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

**In-app purchases:** none


## Frequently asked questions

### Is r.Calc free?

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

### Is SwiftRPN free?

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

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

SwiftRPN is rated higher. r.Calc averages 4.0 out of 5 from 3 ratings, while SwiftRPN averages 5.0 from 1 ratings.

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

Neither r.Calc nor SwiftRPN shows ads.

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

r.Calc ships an update every 197 months, and SwiftRPN every 14 months. Most recently, r.Calc was updated on June 10, 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.*