Create an app for android

App that works on base of communicator. In a form of image where both sides of conversation can write interactively on that same image. One person can see and edit what other person is actually doing on her screen (works both ways, needed internet connection). It' suppose to serve people who want to explain topics by drawing or writing on something. It has to have social media integration, log-in features. Good architecture is needed for modifications nad upgrades.