# C Library Reference vs Learn CSS

The clearest difference is update cadence: C Library Reference at every 3 days against Learn CSS's every 2 months. Learn CSS's advantage is iOS requirement (15.1 vs 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.

C Library Reference ships an update every 3 days, Learn CSS every 2 months. The most recent releases landed on September 17, 2026 and July 16, 2026 respectively.

## The numbers

| Metric | C Library Reference | Learn CSS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/learn-css-web-design-lab/id6757161168/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 2 months |
| Monetization | — | Free |
| Size | 3 MB | 116 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Roger Rub](https://appshunter.io/developer/1852594545) | [Pejoal Hanna](https://appshunter.io/developer/1848573493) |

## What reviewers say

### C Library Reference

[App page](https://appshunter.io/ios/app/c-library-reference/id6756002515)

**Features:** macOS Compatibility

**In-app purchases:** none


### Learn CSS

[App page](https://appshunter.io/ios/app/learn-css-web-design-lab/id6757161168)

Master Cascading Style Sheets with interactive lessons, a real-time code editor, and gamified challenges. Learn fundamentals, responsive design, and modern layouts to build professional web designs.

**Highlights:** Interactive CSS tutorials, Real-time code editor, Daily coding tips and quizzes, Gamified learning with XP and achievements, Professional UI mockup assets, Offline lesson access

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is C Library Reference free?

C Library Reference is free to download, with no in-app purchases.

### Is Learn CSS free?

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

### Do C Library Reference or Learn CSS have ads?

Neither C Library Reference nor Learn CSS shows ads.

### Which is updated more often, C Library Reference or Learn CSS?

C Library Reference ships an update every 3 days, and Learn CSS every 2 months. Most recently, C Library Reference was updated on September 17, 2026 and Learn CSS on July 16, 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.*