# System Designer vs QtWS 2019 (QtWorldSummit)

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.

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

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.

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.

## The numbers

| Metric | System Designer | QtWS 2019 (QtWorldSummit) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (17 ratings)](https://appshunter.io/ios/app/system-designer/id1132983280/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/qtws-2019-qtworldsummit/id1156106928/reviews)** |
| Number of ratings | **17** | 1 |
| Positive reviews | 77.8% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 7 MB | 60 MB |
| Requires iOS | **15.6** | 18 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Erwan Carriou](https://appshunter.io/developer/1102494853) | [Ekkehard Gentz](https://appshunter.io/developer/1144162385) |

## What reviewers say

### System Designer

[App page](https://appshunter.io/ios/app/system-designer/id1132983280)

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:** macOS Compatibility

**In-app purchases:** none


### QtWS 2019 (QtWorldSummit)

[App page](https://appshunter.io/ios/app/qtws-2019-qtworldsummit/id1156106928)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*