Which library to choose for creating GUI applications?

Question

User interface

It is planned to write a number of cross-platform applications with a graphical interface. The main language is C++.
My choice fell on Qt and GTK, which one should I choose based on the following criteria? Or would you recommend something else?
Criteria, by priority:

1. Cross-platform (Windows, Mac, Linux (including possibly Android));
   
2. Good C++ support;
   
3. License (the cleaner the better);
   

Complexity doesn't matter (within reason, of course). And it is desirable that the library has prospects in the future.
UPD#1: Can also support SI

Answer 1

Nothing against GTK, but for serious applications with future support - Qt. He's all right with the future. If we discard the issue of language complexity (C++ vs. Java/C#), today I would recommend it even for Windows-only applications.
Now modern developments, such as Qt Quick, look very interesting.

Answer 2

I don’t write a GUI, but on a toaster, as soon as it’s so, everyone recommends QT at once :)

Answer 3

1. If Android is needed, then GTK is no longer needed.
2. GTK here, although there is some strange OOP.
3. I will not advise anything.

Answer 4

GTK is OK, but in C