This project is two parts one software and another is hardware .
Software part
Depend on Arduino IDE program and 1shield mobile application.
Hardware part
Depend on Arduino board, 1shield board .
Continue reading to know in details how to connect two parts to make that project .
This video show in details how this project work
That is a great project. I read all details provided here. Actually I was also looking for a similar app which can do the similar work. If I go in details, I read an article today, which is given in end. And in this article there is one app explained which can completely synchronize one Android phone to another. Similarly I want the blueprints of such app, and current project will also help me a lot.
Idea: https://www.technows.com/how-to-sync-my-boyfriends-phone-to-mine/