# Watki vs permutation group

The clearest difference is iOS requirement: permutation group at 16.6 against Watki's 18.0. 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.

## The numbers

| Metric | Watki | permutation group |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (3 ratings)](https://appshunter.io/ios/app/watki/id1056915836/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 134 months | — |
| Monetization | Free | — |
| Size | 7 MB | 6 MB |
| Requires iOS | 18.0 | **16.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Saumya Lahera](https://appshunter.io/developer/921732703) | [Sungjun Kim](https://appshunter.io/developer/1602461985) |

## What reviewers say

### Watki

[App page](https://appshunter.io/ios/app/watki/id1056915836)

This app provides offline access to detailed descriptions of all OpenGL ES commands and functions from the official Khronos Group website. It's designed to help developers easily reference graphics API information, even for beginners.

**Highlights:** Complete OpenGL ES 3.2 command descriptions, Information from official Khronos Group website, Offline access, Systematic function listing, Search bar and index, Landscape mode support

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

**In-app purchases:** none


### permutation group

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Watki free?

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

### Is permutation group free?

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

### Do Watki or permutation group have ads?

Neither Watki nor permutation group shows ads.

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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.*