# r.Calc vs Dozecal

The clearest difference is price: Dozecal at Free against r.Calc's $0.99. Dozecal also leads on update cadence (every 10 months vs every 197 months). r.Calc's advantage is review sentiment (100% vs 75%) and iOS requirement (2.2.1 vs 12.0). On rating, ratings volume, ads and in-app purchases there is nothing between them.

Dozecal is free to download; r.Calc costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.0 for r.Calc against 4.0 for Dozecal. Both are backed by a comparable volume of ratings — 3 and 4 respectively. Written reviews are what separate them: 100% of r.Calc's written reviews are positive against 75% of Dozecal's.

r.Calc ships an update every 197 months, Dozecal every 10 months. The most recent releases landed on June 10, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | r.Calc | Dozecal |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [4.0 (3 ratings)](https://appshunter.io/ios/app/rcalc/id291200623/reviews) | [4.0 (4 ratings)](https://appshunter.io/ios/app/dozecal/id1521160089/reviews) |
| Number of ratings | 3 | **4** |
| Positive reviews | **100.0% of reviews** | 75.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 197 months | **Every 10 months** |
| Monetization | Paid | **Free** |
| Size | 0 MB | 27 MB |
| Requires iOS | **2.2.1** | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Nicolas Jorand](https://appshunter.io/developer/291200626) | [Johan Kovacs](https://appshunter.io/developer/1486605020) |

## 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


### 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


## Frequently asked questions

### Is r.Calc free?

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

### Is Dozecal free?

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

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

r.Calc and Dozecal are both rated 4.0 out of 5 on the App Store, from 3 and 4 ratings respectively.

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

Neither r.Calc nor Dozecal shows ads.

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

r.Calc ships an update every 197 months, and Dozecal every 10 months. Most recently, r.Calc was updated on June 10, 2026 and Dozecal on October 2, 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.*