# OpenGL ES Reference vs Lambda calculus

The clearest difference is rating: OpenGL ES Reference at 3.0 against Lambda calculus's 2.5. OpenGL ES Reference also leads on iOS requirement (8.1 vs 16.0). Lambda calculus's advantage is review sentiment (100% vs 67%). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

OpenGL ES Reference holds the better App Store score, 3.0 against 2.5. Both are backed by a comparable volume of ratings — 3 and 2 respectively. Written reviews complicate that: 67% of OpenGL ES Reference's written reviews are positive against 100% of Lambda calculus's, so the app with the better star average is not the one people write more warmly about.

## The numbers

| Metric | OpenGL ES Reference | Lambda calculus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (3 ratings)](https://appshunter.io/ios/app/opengl-es-reference/id1056915836/reviews)** | [2.5 (2 ratings)](https://appshunter.io/ios/app/lambda-calculus/id6737766234/reviews) |
| Number of ratings | **3** | 2 |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Monetization | Free | Free |
| Size | 22 MB | 5 MB |
| Requires iOS | **8.1** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Saumya Lahera](https://appshunter.io/developer/921732703) | [Sungjun Kim](https://appshunter.io/developer/1602461985) |

## 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


### Lambda calculus

[App page](https://appshunter.io/ios/app/lambda-calculus/id6737766234)

Learn the fundamentals of lambda calculus with this educational application. Gain a basic understanding of this important mathematical concept through an introductory experience.

**Highlights:** Introduction to lambda calculus, Basic understanding of concepts, Educational content

**Features:** macOS Compatibility

**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 Lambda calculus free?

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

### Which has better reviews, OpenGL ES Reference or Lambda calculus?

OpenGL ES Reference is rated higher. OpenGL ES Reference averages 3.0 out of 5 from 3 ratings, while Lambda calculus averages 2.5 from 2 ratings.

### Do OpenGL ES Reference or Lambda calculus have ads?

Neither OpenGL ES Reference nor Lambda calculus 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.*