Comparison

System Designer vs Siftl

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

Siftl

Features
Read 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

System Designer3 screens
Siftl4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

System Designer ships an update monthly, Siftl every 3 days. The most recent releases landed on October 6, 2026 and October 1, 2026 respectively.

Scorecard3 real differences · 7 level
System Designer versus Siftl: the parameters behind the verdict, then further details
ParameterSystem DesignerSiftl
PriceFreeFree
Rating4.4 (17 ratings) — better—
Positive reviews77.8% of reviews—
Number of ratings17 — better—
Update frequencyMonthlyEvery 3 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.6 — better17.0
Further details — not scored
Size7 MB7 MB
Age rating4+4+
DeveloperErwan CarriouQubera

In-app purchases

None

System Designer

No in-app purchases

None

Siftl

No in-app purchases

Questions

Is System Designer free?
System Designer is free to download, with no in-app purchases.
Is Siftl free?
Siftl is free to download, with no in-app purchases.
Do System Designer or Siftl have ads?
Neither System Designer nor Siftl shows ads.
Which is updated more often, System Designer or Siftl?
System Designer ships an update monthly, and Siftl every 3 days. Most recently, System Designer was updated on October 6, 2026 and Siftl on October 1, 2026.

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