# permutation group vs Geng Thai

The clearest difference is ads: permutation group at none against Geng Thai's shown. permutation group also leads on iOS requirement (16.6 vs 18.0). On price, 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.

## The numbers

| Metric | permutation group | Geng Thai |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Size | 6 MB | 6 MB |
| Requires iOS | **16.6** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Sungjun Kim](https://appshunter.io/developer/1602461985) | [James Cooper-Stanbury](https://appshunter.io/developer/1613102719) |

## What reviewers say

### permutation group

[App page](https://appshunter.io/ios/app/permutation-group/id6757737753)

**Features:** macOS Compatibility

**In-app purchases:** none


### Geng Thai

[App page](https://appshunter.io/ios/app/geng-thai/id6758282033)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is permutation group free?

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

### Is Geng Thai free?

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

### Do permutation group or Geng Thai have ads?

Geng Thai shows ads; permutation group does not.

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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.*