# Watki vs Surface Explorer

The clearest difference is update cadence: Surface Explorer at every 2 weeks against Watki's every 134 months. 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.

Watki ships an update every 134 months, Surface Explorer every 2 weeks. The most recent releases landed on November 11, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Watki | Surface Explorer |
| --- | --- | --- |
| 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 | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 7 MB | 62 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Saumya Lahera](https://appshunter.io/developer/921732703) | [GAETANO MOSCHETTI](https://appshunter.io/developer/6787015299) |

## 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


### Surface Explorer

[App page](https://appshunter.io/ios/app/surface-explorer/id6787015297)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Watki free?

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

### Is Surface Explorer free?

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

### Do Watki or Surface Explorer have ads?

Neither Watki nor Surface Explorer shows ads.

### Which is updated more often, Watki or Surface Explorer?

Watki ships an update every 134 months, and Surface Explorer every 2 weeks. Most recently, Watki was updated on November 11, 2026 and Surface Explorer on November 5, 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.*