Back in the Windows 7 days I installed Skype on my parents computer before moving abroad, their user experience was basically like receiving a phone call. Even though they weren't tech savvy we never had any issues. I would call them, and if they were home and near the computer, they could answer it and we'd be video chatting. A year or so ago I found this to be impossible, there was no application for desktop that w…
Telegram does that and also has a native (as in C++/Qt) desktop client, unlike almost every other messenger.
Also, I wouldn't exactly call Qt native, unless you happen to be on KDE.