# OpenGL ES Reference vs PHP Programming Guide

The clearest difference is iOS requirement: OpenGL ES Reference at 8.1 against PHP Programming Guide's 17.0. 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 | OpenGL ES Reference | PHP Programming Guide |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (3 ratings)](https://appshunter.io/ios/app/opengl-es-reference/id1056915836/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 2 months |
| Monetization | Free | — |
| Size | 22 MB | 13 MB |
| Requires iOS | **8.1** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Saumya Lahera](https://appshunter.io/developer/921732703) | [ALG Software Lab](https://appshunter.io/developer/1650561236) |

## What reviewers say

### OpenGL ES Reference

[App page](https://appshunter.io/ios/app/opengl-es-reference/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

**In-app purchases:** none


### PHP Programming Guide

[App page](https://appshunter.io/ios/app/php-programming-guide/id6748204544)

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

**In-app purchases:** none


## Frequently asked questions

### Is OpenGL ES Reference free?

OpenGL ES Reference is free to download, with no in-app purchases.

### Is PHP Programming Guide free?

PHP Programming Guide is free to download, with no in-app purchases.

### Do OpenGL ES Reference or PHP Programming Guide have ads?

Neither OpenGL ES Reference nor PHP Programming Guide 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.*