# FractionAndProbability vs Dozenal Calc

The clearest difference is ads: Dozenal Calc at none against FractionAndProbability's shown. Dozenal Calc also leads on device support (5 vs 2) and iOS requirement (13.0 vs 16.6). On price, update cadence 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.

FractionAndProbability ships an update every 2 days, Dozenal Calc every 3 days. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | FractionAndProbability | Dozenal Calc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 2 days** | Every 3 days |
| Size | 3 MB | 32 MB |
| Requires iOS | 16.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Katsuhiko Yao](https://appshunter.io/developer/1543188534) | [Eric Naville](https://appshunter.io/developer/6777149198) |

## What reviewers say

### FractionAndProbability

[App page](https://appshunter.io/ios/app/fractionandprobability/id6742116020)

**Features:** macOS Compatibility

**In-app purchases:** none


### Dozenal Calc

[App page](https://appshunter.io/ios/app/dozenal-calc/id6777149196)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is FractionAndProbability free?

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

### Is Dozenal Calc free?

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

### Do FractionAndProbability or Dozenal Calc have ads?

FractionAndProbability shows ads; Dozenal Calc does not.

### Which is updated more often, FractionAndProbability or Dozenal Calc?

FractionAndProbability ships an update every 2 days, and Dozenal Calc every 3 days. Most recently, FractionAndProbability was updated on October 28, 2026 and Dozenal Calc on October 24, 2026.

---

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