Comparison

System Designer vs QtWS 2019 (QtWorldSummit)

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

QtWS 2019 (QtWorldSummit)

Access schedules, speaker bios, and session abstracts for the Qt World Summit. Navigate event locations with an integrated floor map and personalize your experience by selecting favorite talks. This app is built with Qt and is cross-platform.

Highlights
  • Event schedule access
  • Speaker biographies
  • Session abstracts
  • Integrated floor map
  • Personalized talk selection
  • Cross-platform compatibility
Features
Read full description

The QtWS app -- Your window to the Qt World Summit - a Developer Example App See what kind of Apps can be developed using Qt 6.12 Explore QtWS2019for Trainings, Keynotes and Development Topics for Embedded, Desktop, Mobile Devices and more. QtWS2019 gives you access to old data from these Conferences (Berlin, Tokyo) - easy switch between the schedules Find up-to-date session abstracts, view the agenda at a glance, read the speaker bios and find your way around using the integrated floor-map. Create your own path through the event by selecting your favorite talks. Yup, the app is of course #BuiltwithQt using Qt Quick Controls and Qt 6.12. And it's cross-platform -- obviously. About QtWS: The 2019 Qt World Summit will happen in Berlin, November 04-06 and Tokyo, November 29

Screenshots

System Designer3 screens
QtWS 2019 (QtWorldSummit)4 screens

Verdict

The call

The clearest difference is rating: QtWS 2019 (QtWorldSummit) at 5.0 against System Designer's 4.4. QtWS 2019 (QtWorldSummit) also leads on review sentiment (100% vs 78%). System Designer's advantage is ratings volume (17 vs 1) and iOS requirement (15.6 vs 18). On price, update cadence, 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.

ReceptionRating · Positive reviews · Number of ratings

QtWS 2019 (QtWorldSummit) holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: System Designer has 17 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 78% of System Designer's written reviews are positive against 100% of QtWS 2019 (QtWorldSummit)'s.

UpkeepUpdate frequency

System Designer ships an update monthly, QtWS 2019 (QtWorldSummit) every 3 weeks. The most recent releases landed on October 23, 2026 and October 4, 2026 respectively.

Scorecard4 real differences · 6 level
System Designer versus QtWS 2019 (QtWorldSummit): the parameters behind the verdict, then further details
ParameterSystem DesignerQtWS 2019 (QtWorldSummit)
PriceFreeFree
Rating4.4 (17 ratings)5.0 (1 ratings) — better
Positive reviews77.8% of reviews100.0% of reviews — better
Number of ratings17 — better1
Update frequencyMonthlyEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better18
Further details — not scored
Size7 MB60 MB
Age rating4+4+
DeveloperErwan CarriouEkkehard Gentz

Customer experience

System Designer

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

QtWS 2019 (QtWorldSummit)

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

System Designer

No in-app purchases

None

QtWS 2019 (QtWorldSummit)

No in-app purchases

Questions

Is System Designer free?
System Designer is free to download, with no in-app purchases.
Is QtWS 2019 (QtWorldSummit) free?
QtWS 2019 (QtWorldSummit) is free to download, with no in-app purchases.
Which has better reviews, System Designer or QtWS 2019 (QtWorldSummit)?
QtWS 2019 (QtWorldSummit) is rated higher. System Designer averages 4.4 out of 5 from 17 ratings, while QtWS 2019 (QtWorldSummit) averages 5.0 from 1 ratings.
Do System Designer or QtWS 2019 (QtWorldSummit) have ads?
Neither System Designer nor QtWS 2019 (QtWorldSummit) shows ads.
Which is updated more often, System Designer or QtWS 2019 (QtWorldSummit)?
System Designer ships an update monthly, and QtWS 2019 (QtWorldSummit) every 3 weeks. Most recently, System Designer was updated on October 23, 2026 and QtWS 2019 (QtWorldSummit) on October 4, 2026.

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