# FractionAndProbability vs Flag Quiz X

The clearest difference is ads: Flag Quiz X at none against FractionAndProbability's shown. On price, update cadence, 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.

Both ship on a similar rhythm, roughly every 2 days. Both last shipped on October 28, 2026.

## The numbers

| Metric | FractionAndProbability | Flag Quiz X |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 2 days | Every 2 days |
| Size | 3 MB | 10 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Katsuhiko Yao](https://appshunter.io/developer/1543188534) | [Hatsuhito Shimizu](https://appshunter.io/developer/1809291940) |

## What reviewers say

### FractionAndProbability

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Flag Quiz X

[App page](https://appshunter.io/ios/app/flag-quiz-x-world-flags/id6785129599)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is FractionAndProbability free?

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

### Is Flag Quiz X free?

Flag Quiz X is free to download, with no in-app purchases.

### Do FractionAndProbability or Flag Quiz X have ads?

FractionAndProbability shows ads; Flag Quiz X does not.

### Which is updated more often, FractionAndProbability or Flag Quiz X?

FractionAndProbability ships an update every 2 days, and Flag Quiz X every 2 days. Most recently, FractionAndProbability was updated on October 28, 2026 and Flag Quiz X on October 28, 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.*