System Designer vs Standard Detective
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- UML-based system modeling
- Code skeleton generation
- Graphical component creation
- MSON format for model definition
- Dynamic type checking
- Cross-device synchronization via GitHub
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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.
Standard Detective
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This application displays the issuance and deliberation status of standards provided by IEC. In addition, when new standard published, withdrawn or change of deliberation status occurs, the summary will be notified. Targets are standards and related standards issued by the following IEC committees related to product safety, such as electrical safety and electromagnetic compatibility, environmental impact, explosive atmosphere, pressurized enclosure, etc. Nationwide standards related to this will also be posted sequentially. TC 31, TC 44, TC 61, TC 64, TC 66, TC 76, TC 77, TC 99, TC 101, TC 108, TC 111, TC 116. This application provides easy access to the information provided by the standard issuing organization, but it is not supported by each organization. Please refrain from inquiring to each group concerning this application.
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Verdict
The clearest difference is update cadence: System Designer at monthly against Standard Detective's every 2 months. System Designer also leads on iOS requirement (15.6 vs 17.0). On price, ads, in-app purchases and device support 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
System Designer ships an update monthly, Standard Detective every 2 months. The most recent releases landed on September 18, 2026 and August 20, 2026 respectively.
| Parameter | System Designer | Standard Detective |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (17 ratings) — better | — |
| Positive reviews | 77.8% of reviews | — |
| Number of ratings | 17 — better | — |
| Update frequency | Monthly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 7 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Erwan Carriou | Masahiko Takahashi |
In-app purchases
System Designer
No in-app purchases
Standard Detective
No in-app purchases
Questions
Is System Designer free?
Is Standard Detective free?
Do System Designer or Standard Detective have ads?
Which is updated more often, System Designer or Standard Detective?
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