# Watki vs GT Graph

The clearest difference is in-app purchases: Watki at none against GT Graph's 1. GT Graph's advantage is update cadence (every 8 days vs every 134 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. GT Graph sells 1 one-off in-app purchase. Watki asks for nothing beyond the download.

Watki ships an update every 134 months, GT Graph every 8 days. The most recent releases landed on November 11, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Watki | GT Graph |
| --- | --- | --- |
| 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** | Yes |
| Ads | No | No |
| Update frequency | Every 134 months | **Every 8 days** |
| Monetization | Free | — |
| Size | 7 MB | 1 MB |
| Requires iOS | 18.0 | 18.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Saumya Lahera](https://appshunter.io/developer/921732703) | [Gennaro Eduardo Tangari](https://appshunter.io/developer/1616502345) |

## 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


### GT Graph

[App page](https://appshunter.io/ios/app/gt-graph/id6757393417)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| GT Graph In-App Purchase | $0.99 | one-time |


## Frequently asked questions

### Is Watki free?

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

### Is GT Graph free?

GT Graph is free to download, with in-app purchases available.

### Do Watki or GT Graph have ads?

Neither Watki nor GT Graph shows ads.

### Which is updated more often, Watki or GT Graph?

Watki ships an update every 134 months, and GT Graph every 8 days. Most recently, Watki was updated on November 11, 2026 and GT Graph on November 9, 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.*