# System Designer vs CodeBrew

The clearest difference is rating: System Designer at 4.4 against CodeBrew's 3.8. System Designer also leads on in-app purchases (none vs 1) and update cadence (monthly vs every 3 months). On price, ratings volume, ads and monetization model there is nothing between them.

Both are free to download. CodeBrew sells 1 one-off in-app purchase. System Designer asks for nothing beyond the download.

System Designer holds the better App Store score, 4.4 against 3.8. Both are backed by a comparable volume of ratings — 17 and 9 respectively. Written reviews point the same way: 78% of System Designer's written reviews are positive against 69% of CodeBrew's.

System Designer ships an update monthly, CodeBrew every 3 months. The most recent releases landed on September 18, 2026 and July 6, 2026 respectively.

## The numbers

| Metric | System Designer | CodeBrew |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (17 ratings)](https://appshunter.io/ios/app/system-designer/id1132983280/reviews)** | [3.8 (9 ratings)](https://appshunter.io/ios/app/codebrew-ide-for-java/id6475267297/reviews) |
| Number of ratings | **17** | 9 |
| Positive reviews | **77.8% of reviews** | 68.8% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 3 months |
| Monetization | Free | Free |
| Size | 7 MB | 379 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Erwan Carriou](https://appshunter.io/developer/1102494853) | [Julius Naeumann](https://appshunter.io/developer/1402019766) |

## What reviewers say

### System Designer

[App page](https://appshunter.io/ios/app/system-designer/id1132983280)

Design complex systems using a low-code platform that leverages UML standards. Generate code skeletons and manage components graphically. Run and test your system with dynamic type checking.

**Highlights:** UML-based system modeling, Code skeleton generation, Graphical component creation, MSON format for model definition, Dynamic type checking, Cross-device synchronization via GitHub

**Features:** macOS Compatibility

**In-app purchases:** none


### CodeBrew

[App page](https://appshunter.io/ios/app/codebrew-ide-for-java/id6475267297)

This mobile application provides a full Java Integrated Development Environment (IDE) for iOS devices. It features intelligent code completion, live issue highlighting, and includes the Java 21 JDK for offline use. Users can also explore game development with a custom graphics framework and learn from example projects.

**Highlights:** Java 21 JDK included, Offline coding support, Intelligent code completion, Live issue highlighting, Custom graphics framework for games, Example projects library

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CodeBrew Pro | $17.99 | one-time |


## Frequently asked questions

### Is System Designer free?

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

### Is CodeBrew free?

CodeBrew is free to download, with in-app purchases available.

### Which has better reviews, System Designer or CodeBrew?

System Designer is rated higher. System Designer averages 4.4 out of 5 from 17 ratings, while CodeBrew averages 3.8 from 9 ratings.

### Do System Designer or CodeBrew have ads?

Neither System Designer nor CodeBrew shows ads.

### Which is updated more often, System Designer or CodeBrew?

System Designer ships an update monthly, and CodeBrew every 3 months. Most recently, System Designer was updated on September 18, 2026 and CodeBrew on July 6, 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.*