Can UMG Be Used To Create Apps?


I was wondering what the potential power of UMG is beyond game UI’s or HUD’s.

Can UMG be used to create and develop a full mobile application, say for instance a social media platform like Facebook?

I have a client who I am working with to develop a real estate application and wanted to know if UMG and Unreal Engine 4 can be used to make the menu’s and buttons, etc.