Write an Android application

I need an android application which should be able to do the following things : It is basically app like snapchat. 1) User Registration / Login Functionality with SQLite. 2) Adding Friends in Friends list (Like Skype / Facebook) 3) Chatting functionlaity with friends. 4) When user sends a message to any of his friend in his friends list. This message should also be redirected to his friend's email address. And when he reads this message from his app, the message should be marked as read on his email also. And when he reads this message on his email, the message should be marked as read on his app also. 5) Shows Online / Offline status of friends. Lot of work in future after successfully completion of this app. Thanks.