How to build a world class news app

We are going to build a news app where you subscribe to 100's of news agencies like CNN, ABC, AlJazeera and other Arabic news agencies, mainly in Arabic, so we need to know in a study the design of this app, the technologies that we can use and from where to enable automatic content aggregation, we don't want to make it manual, it should be automated. competitor apps are [login to view URL] [login to view URL]