A game designer is someone who creates visual content for video games - entire virtual worlds and their interactive stories, characters, and game levels etc.
App design is a pull of activities that involve both user interface (UI) and user experience (UX), where app designers are in charge of making the app look attractive, while developers make it operate in a proper way.
This type of software is part of the self-service movement that empowers business users to create, manipulate, and employ data-driven applications to do their work better.