Wappler and Wordpress? Wappler's purpose?

Hi Folks, maybe I don’t quite understand what wappler is. I thought that it is a vehicle for creating a third party web app for mobile, pulling blogs/pages or posts from existing websites. I see people talking about building the entire site in Wappler, which is not what I want to do. Am I misunderstanding something?

If I am correct in its function, is it possible then to pull pages and posts from WordPress? Or Facebook?