I was about to build a prototype for this. 

In my mind the basic is: download an open app store (eg: nostr:nprofile1qy2hwumn8ghj7erfw36x7tnsw43z7un9d3shjqpq0r8xl2njyepcw2zwv3a6dyufj4e4ajx86hz6v4ehu4gnpupxxp7slzk40u ), install Amber, create a new identity, install one mobile client (chat/social or both), login with Amber.