It's an app that I made through an online [course](https://www.udemy.com/qt5-gui-cpp-programming-tutorial-2d-graphics/learn/v4/overview) in which I learned the basics of the Qt framework and GUI building. It was a funny experience and I think I'll use this framework for some of my next projects.

[This](https://thepra.dev/app/QtCurvesCpp.zip) is a link to such program, extract it, and execute(on Windows) the QtCurvesCpp.exe inside the extracted folder.