# Dozecal vs SwiftRPN

The clearest difference is rating: SwiftRPN at 5.0 against Dozecal's 4.2. Dozecal's advantage is ratings volume (5 vs 1) and iOS requirement (12.0 vs 17.6). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

SwiftRPN holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Dozecal has 5 ratings behind it against 1, so its average is the more settled of the two.

Dozecal ships an update every 10 months, SwiftRPN every 14 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Dozecal | SwiftRPN |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (5 ratings)](https://appshunter.io/ios/app/dozecal/id1521160089/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/swiftrpn/id6470951024/reviews)** |
| Number of ratings | **5** | 1 |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 months** | Every 14 months |
| Monetization | Free | — |
| Size | 27 MB | 3 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Johan Kovacs](https://appshunter.io/developer/1486605020) | [Patrick Gelvin](https://appshunter.io/developer/1573354051) |

## What reviewers say

### Dozecal

[App page](https://appshunter.io/ios/app/dozecal/id1521160089)

This educational calculator promotes the use of Base Twelve (duodecimal) in math and science. It offers standard mathematical functions in both duodecimal and decimal modes, with automatic conversion between them. It utilizes Reverse Polish Notation (RPN) for calculations.

**Highlights:** Duodecimal and Decimal modes, Automatic mode conversion, RPN (Reverse Polish Notation) input, Standard math functions, Trigonometric operations (degrees), Educational tool for Base Twelve

**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 Dozecal free?

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

### Is SwiftRPN free?

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

### Which has better reviews, Dozecal or SwiftRPN?

SwiftRPN is rated higher. Dozecal averages 4.2 out of 5 from 5 ratings, while SwiftRPN averages 5.0 from 1 ratings.

### Do Dozecal or SwiftRPN have ads?

Neither Dozecal nor SwiftRPN shows ads.

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

Dozecal ships an update every 10 months, and SwiftRPN every 14 months. Most recently, Dozecal was updated on October 24, 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.*