System Designer vs Siftl
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
Read full descriptionHide 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.
Siftl
Read full descriptionHide full description
There is so much good stuff on the internet. A tweet that makes you think, an article you want to read properly, a video you know you'll want to watch again, a photo, an idea, a piece of advice. You save it thinking you'll come back to it. But you never do. The feed keeps moving and you keep moving with it. And that thing you wanted to remember gets buried under everything that came after. Siftl doesn't let it. This is a place for the things worth coming back to. Share something to Siftl and it goes into your Trove. Over time, it becomes a collection of things you found interesting enough to save. Every now and then, Siftl brings one back. Something you saved a few months ago. Something you'd completely forgotten about. You'll wonder why you saved it, or how you ever forgot it. Because good things are worth coming back to.
Screenshots
Verdict
The clearest difference is update cadence: Siftl at every 3 days against System Designer's monthly. System Designer's advantage is device support (3 vs 1) and iOS requirement (15.6 vs 17.0). On price, ads and in-app purchases 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, Siftl every 3 days. The most recent releases landed on October 6, 2026 and October 1, 2026 respectively.
| Parameter | System Designer | Siftl |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (17 ratings) — better | — |
| Positive reviews | 77.8% of reviews | — |
| Number of ratings | 17 — better | — |
| Update frequency | Monthly | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 7 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Erwan Carriou | Qubera |
In-app purchases
System Designer
No in-app purchases
Siftl
No in-app purchases









