# CodeUp vs C Library Reference

The clearest difference is update cadence: C Library Reference at every 3 days against CodeUp's every 6 months. CodeUp's advantage is iOS requirement (13.4 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.

CodeUp ships an update every 6 months, C Library Reference every 3 days. Both last shipped on September 17, 2026.

## The numbers

| Metric | CodeUp | C Library Reference |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 days** |
| Size | 22 MB | 3 MB |
| Requires iOS | **13.4** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ben Siebert](https://appshunter.io/developer/1703019142) | [Roger Rub](https://appshunter.io/developer/1852594545) |

## What reviewers say

### CodeUp

[App page](https://appshunter.io/ios/app/codeup/id6462418728)

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

**In-app purchases:** none


### C Library Reference

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CodeUp free?

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

### Is C Library Reference free?

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

### Do CodeUp or C Library Reference have ads?

Neither CodeUp nor C Library Reference shows ads.

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

CodeUp ships an update every 6 months, and C Library Reference every 3 days. Most recently, CodeUp was updated on September 17, 2026 and C Library Reference on September 17, 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.*