Can you comment on your experience? One of my doubts is if I should go the QML / Qt Quick Controls way or the standard Qt Widgets (with PyQt).. For instance, do you think you could implement your app's interface with Qt Widgets by itself?
The problem is that I know how far I can go with Qt Widgets, but on the same way, I would like to build something more "modern" and Qt Widgets may be quite limited..
I could have implemented it with QtWidgets, however I had found a decent UI widget library that suited my use case very well ([1]). Hence went with QML/QtQuick.
My advice - just do it :-). If you want to build a cross-platform desktop app then go for QtQuick/QML/C++. QtCreator has a bunch of example projects. Use those as reference. The Qt docs are solid. Worst case - you will learn that Qt/C++.
I am not a big fan of PyQt/PySide, especially when starting fresh with Qt - you would have a hard time figuring out how everything fits and where the issues are.
I have used web-based task/todo lists (trello, asana, etc.) but I wanted something that could be used offline - my work does not allow storing company sensitive data on 3rd-party servers.
Started the project with Electron, using AngularJS and Angular Material. That allowed rapid prototyping with a slick UI and it was fairly easy to find additional Angular-based plugins. My main motivation in selecting Electron and Angular was to learn the two technologies (easier to learn something by doing a project in it). Screenshot: http://imgur.com/NZzEFKX
Had a few issues with the Electron app - big download size (50-70MB zipped), no print functionality, app felt non-native, very convoluted process to get it published on the Mac App Store.
Decided to change the tech stack to Qt/QML. I have published C++-based games, built on Cocos2dx. Wanted to try Qt to build a serious app.
Gumroad has been a slick experience - I have opted for the fully functional trial option and let the user buy a license to use beyond the trial period. Gumroad's onboarding (buy workflow) and tech (license key generation and validation) have been a revelation.
The problem is that I know how far I can go with Qt Widgets, but on the same way, I would like to build something more "modern" and Qt Widgets may be quite limited..