Cycle Through Windows? Mac

Hi I wanted to know how to cycle troguh windows (shortcut), both of the same app and from a different app on Mac. As I've read from this tread the famous shortcut "Cmd + ' " got replaced.

So any advice? I'm ok also to buy a third party app, thanks.

https://apple.stackexchange.com/questions/193937/shortcut-for-toggling-between-different-windows-of-same-app/193938