Comparison

System Designer vs CodeBrew

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

System Designer

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
Read full description

System Designer is a low-code development platform for creating systems. No matter the frameworks you use and the code you write, the most important is the model that you define to create your system. System Designer helps you to design this model and to generate the classes and components to build your system. DESIGN YOUR SYSTEM WITH EASE If you look at the different JavaScript frameworks on the market, you will notice that they all have their own way to define a model, generally only with code. System Designer uses UML, a standard, to define your model. So you probably already know how to design in System Designer even if you have never run it. The definition of the model is stored on a JSON format called MSON. With MSON you can define types, classes, one to one / one to many relationships and multi inheritance between classes. CODE THE BEHAVIOR OF YOUR SYSTEM Once you have created your model, System Designer generates the skeletons of all your methods. You only have then to add your code to implement them. System Designer provides you helpers to manage your components. You can easily navigate threw your components to create your application. CREATE COMPONENTS GRAPHICALLY There is no need to code to instantiate a component. Create a component in System Designer is like creating a document in a NoSQL Database. In fact, System Designer acts as an ODM (Object-Document Mapper) to manage your components as NoSQL Documents. RUN YOUR SYSTEM You can run your system directly from System Designer. Because you have defined a model for your application, a Dynamic Type Check is done on every action of your system. All warnings are send and shown in System Designer. DESIGN ON THE GO System Designer can be used on macOS, iPad or any browsers. System Designer has a Github module to synchronize your work between all these apps. You can begin your design on your Mac and then continue it on your iPad.

About

CodeBrew

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
Read full description

Introducing CodeBrew: Your Java IDE for iPad & iPhone! Unleash the power of Java coding on your iPhone or iPad with CodeBrew - the ultimate Java Integrated Development Environment designed for developers on the go. Dive into the world of seamless coding, whether you're a seasoned pro or just starting your programming journey. What sets CodeBrew apart? CodeBrew is not just an IDE; it's your complete coding sanctuary on your iPad & iPhone. The powerful code editor comes equipped with intelligent code completions and live issue highlighting, ensuring your code is not just written but crafted to perfection. Java 21 JDK On-The-Go! CodeBrew comes bundled with OpenJ9 Java 21 JDK, running entirely on your iPad or iPhone - no internet connection required. Empower your coding journey without limitations, anytime, anywhere. Craft Simple Games with Ease! Unleash your creativity! CodeBrew boasts a custom graphics framework that simplifies game development. Whether you're building the next viral sensation or just tinkering for fun, CodeBrew makes coding games a breeze. Explore with Example Projects! Not sure where to start? CodeBrew includes a library of example projects to guide you. Learn from real-world scenarios, kickstart your projects, and elevate your coding prowess. Who is CodeBrew for? CodeBrew is tailor-made for developers seeking a powerful, portable Java 17 IDE. Whether you're a student learning the ropes, a professional crafting intricate solutions, or a hobbyist exploring the world of coding, CodeBrew is your ideal companion. Embark on a coding adventure like never before with CodeBrew. Download now and revolutionize your Java development experience on your iPad! Java is a registered trademark of Oracle and/or its affiliates The Terms of Service apply: https://astrobeats.net/tos.html

Screenshots

System Designer3 screens
CodeBrew4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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

Scorecard4 real differences · 6 level
System Designer versus CodeBrew: the parameters behind the verdict, then further details
ParameterSystem DesignerCodeBrew
PriceFreeFree
Rating4.4 (17 ratings) — better3.8 (9 ratings)
Positive reviews77.8% of reviews — better68.8% of reviews
Number of ratings17 — better9
Update frequencyMonthly — betterEvery 3 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.615.0 — better
Further details — not scored
Size7 MB379 MB
Age rating4+4+
DeveloperErwan CarriouJulius Naeumann

Customer experience

System Designer

All ratings17 ratings
Positive88.2%
Neutral0.0%
Negative11.8%
Written reviews9 reviews
Positive77.8%
Neutral0.0%
Negative22.2%

CodeBrew

All ratings9 ratings
Positive55.6%
Neutral22.2%
Negative22.2%
Written reviews16 reviews
Positive68.8%
Neutral18.8%
Negative12.5%

In-app purchases

None

System Designer

No in-app purchases

1 purchases

CodeBrew

One-time1
  • CodeBrew Pro$17.99

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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