# RPNPro vs Dozecal

The clearest difference is rating: RPNPro at 5.0 against Dozecal's 4.0. RPNPro also leads on iOS requirement (9.1 vs 12.0). Dozecal's advantage is review sentiment (75% vs 50%) and update cadence (every 10 months vs every 37 months). On price, ads, in-app purchases and monetization model there is nothing between them.

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

RPNPro holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 4 respectively. Written reviews complicate that: 50% of RPNPro's written reviews are positive against 75% of Dozecal's, so the app with the better star average is not the one people write more warmly about.

RPNPro ships an update every 37 months, Dozecal every 10 months. The most recent releases landed on September 28, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | RPNPro | Dozecal |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rpnpro/id603155368/reviews)** | [4.0 (4 ratings)](https://appshunter.io/ios/app/dozecal/id1521160089/reviews) |
| Number of ratings | 1 | **4** |
| Positive reviews | 50.0% of reviews | **75.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 37 months | **Every 10 months** |
| Monetization | Free | Free |
| Size | 1 MB | 27 MB |
| Requires iOS | **9.1** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Felix Meier](https://appshunter.io/developer/603155771) | [Johan Kovacs](https://appshunter.io/developer/1486605020) |

## What reviewers say

### RPNPro

[App page](https://appshunter.io/ios/app/rpnpro/id603155368)

This calculator utilizes Reverse Polish Notation (RPN) for input, mirroring the functionality of classic HP calculators. It features a four-level stack with X, Y, Z, and T registers, displaying the X register in decimal, hexadecimal, and binary.

**Highlights:** Reverse Polish Notation (RPN) input, Four-level stack (X, Y, Z, T registers), Decimal, hexadecimal, and binary display, Modeled after HP calculators, Designed for software engineers

**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 RPNPro free?

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

### Is Dozecal free?

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

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

RPNPro is rated higher. RPNPro averages 5.0 out of 5 from 1 ratings, while Dozecal averages 4.0 from 4 ratings.

### Do RPNPro or Dozecal have ads?

Neither RPNPro nor Dozecal shows ads.

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

RPNPro ships an update every 37 months, and Dozecal every 10 months. Most recently, RPNPro was updated on September 28, 2026 and Dozecal on October 2, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*