# System Designer vs HTML ColorCode

The clearest difference is ads: System Designer at none against HTML ColorCode's shown. System Designer also leads on monetization model (free vs ad-supported). HTML ColorCode's advantage is rating (4.8 vs 4.4) and review sentiment (90% vs 78%). On price, update cadence, 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.

HTML ColorCode holds the better App Store score, 4.8 against 4.4. That said, the two scores are not equally well evidenced: HTML ColorCode has 92 ratings behind it against 17, so its average is the more settled of the two. Written reviews point the same way: 78% of System Designer's written reviews are positive against 90% of HTML ColorCode's.

System Designer ships an update monthly, HTML ColorCode every 5 weeks. The most recent releases landed on September 18, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | System Designer | HTML ColorCode |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (17 ratings)](https://appshunter.io/ios/app/system-designer/id1132983280/reviews) | **[4.8 (92 ratings)](https://appshunter.io/ios/app/html-colorcode/id1135472340/reviews)** |
| Number of ratings | 17 | **92** |
| Positive reviews | 77.8% of reviews | **90.0% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Monthly** | Every 5 weeks |
| Monetization | **Free** | Ad-supported |
| Size | 7 MB | 21 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Erwan Carriou](https://appshunter.io/developer/1102494853) | [masashi012](https://appshunter.io/developer/524897474) |

## 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


### HTML ColorCode

[App page](https://appshunter.io/ios/app/html-colorcode/id1135472340)

Find color codes easily with this tool. Select colors from a list, adjust them to your preferences, and get numerical values for use in development. Streamline your workflow for web and app design.

**Highlights:** Select colors from a list, Adjust favorite colors, Display numerical values, Supports web development, Supports Xcode development

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is System Designer free?

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

### Is HTML ColorCode free?

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

### Which has better reviews, System Designer or HTML ColorCode?

HTML ColorCode is rated higher. System Designer averages 4.4 out of 5 from 17 ratings, while HTML ColorCode averages 4.8 from 92 ratings.

### Do System Designer or HTML ColorCode have ads?

HTML ColorCode shows ads; System Designer does not.

### Which is updated more often, System Designer or HTML ColorCode?

System Designer ships an update monthly, and HTML ColorCode every 5 weeks. Most recently, System Designer was updated on September 18, 2026 and HTML ColorCode on September 12, 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.*