# FractionAndProbability vs Kids World Flags

The clearest difference is update cadence: FractionAndProbability at every 2 days against Kids World Flags's every 2 weeks. Kids World Flags's advantage is iOS requirement (13.0 vs 16.6). On price, ads, in-app purchases and device support 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, Kids World Flags every 2 weeks. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | FractionAndProbability | Kids World Flags |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Every 2 days** | Every 2 weeks |
| Size | 3 MB | 38 MB |
| Requires iOS | 16.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Katsuhiko Yao](https://appshunter.io/developer/1543188534) | [Anh Nguyen](https://appshunter.io/developer/1886060562) |

## What reviewers say

### FractionAndProbability

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Kids World Flags

[App page](https://appshunter.io/ios/app/kids-world-flags/id6761519233)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is FractionAndProbability free?

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

### Is Kids World Flags free?

Kids World Flags is free to download, with no in-app purchases.

### Do FractionAndProbability or Kids World Flags have ads?

Both FractionAndProbability and Kids World Flags show ads.

### Which is updated more often, FractionAndProbability or Kids World Flags?

FractionAndProbability ships an update every 2 days, and Kids World Flags every 2 weeks. Most recently, FractionAndProbability was updated on October 28, 2026 and Kids World Flags on October 25, 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.*