# Code Master vs System Designer

The clearest difference is review sentiment: System Designer at 78% against Code Master's 28%. System Designer also leads on rating (4.4 vs 2.7) and update cadence (monthly vs every 5 months). Code Master's advantage is ratings volume (55 vs 17) and iOS requirement (8.0 vs 15.6). On price, ads, in-app purchases and monetization model there is nothing between them.

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

System Designer holds the better App Store score, 4.4 against 2.7. Both are backed by a comparable volume of ratings — 55 and 17 respectively. Written reviews point the same way: 28% of Code Master's written reviews are positive against 78% of System Designer's.

Code Master ships an update every 5 months, System Designer monthly. The most recent releases landed on September 30, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Code Master | System Designer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.7 (55 ratings)](https://appshunter.io/ios/app/code-master-source-code-editor/id502404926/reviews) | **[4.4 (17 ratings)](https://appshunter.io/ios/app/system-designer/id1132983280/reviews)** |
| Number of ratings | **55** | 17 |
| Positive reviews | 28.3% of reviews | **77.8% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Monthly** |
| Monetization | Free | Free |
| Size | 46 MB | 7 MB |
| Requires iOS | **8.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Justin Bush](https://appshunter.io/developer/490452369) | [Erwan Carriou](https://appshunter.io/developer/1102494853) |

## What reviewers say

### Code Master

[App page](https://appshunter.io/ios/app/code-master-source-code-editor/id502404926)

This app offers a visual interface for creating and editing source code for any language, with preview and publishing options. It provides a professional way to manage and share your coding projects on iOS devices, supporting over 170 languages and offering various themes and templates.

**Highlights:** Syntax highlighting for 170+ languages, 70+ syntax colored themes, HTML5 templates and website builder, Live code preview in browser, File upload and sharing, External keyboard support

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🚀 Great app for rebuilding retro webpages
- 👍 Helpful for coding on the go
- 🚀 Impressive and technologically advanced

**What reviewers complain about**

- 🐛 Crashes frequently
- 🐛 Bugs and glitches
- 🐛 Unstable and unreliable
- 🔒 Aggressive upgrade prompts
- 🔒 Unusable free version

**Reported bugs**

- Saved files disappearing or not loading correctly
- Syntax highlighting and language settings not persisting
- Keyboard blocking view of code
- Frequent crashes and freezes

**Requested features**

- Add blank page option for custom themes
- Implement cloud storage support (Dropbox, Google Drive)
- Improve keyboard functionality and text editing
- Introduce code execution and debugging capabilities
- Provide more language support beyond HTML/XML


### 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


## Frequently asked questions

### Is Code Master free?

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

### Is System Designer free?

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

### Which has better reviews, Code Master or System Designer?

System Designer is rated higher. Code Master averages 2.7 out of 5 from 55 ratings, while System Designer averages 4.4 from 17 ratings.

### Do Code Master or System Designer have ads?

Neither Code Master nor System Designer shows ads.

### Which is updated more often, Code Master or System Designer?

Code Master ships an update every 5 months, and System Designer monthly. Most recently, Code Master was updated on September 30, 2026 and System Designer on September 18, 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.*