chat application using Xamarin forms

simple mobile application contains following functional points. - login and signup page , forget password mechanism . - sign up page very simple , required following information:- * user photo (optional). * user name (mandatory ). * password (mandatory ). * confirim password (mandatory). * Email (optional). * birth date (optional). * Gender (Male/ Female). * GPs location this shouald be in back-end and user must enable his Location. after login user will have 5 screens main chat screen ,Useres profile ,list of history chat chat screen , friends /favourate list. and setting screen . -Main screen user can do following * search users based on nerbay and gender . * user can view google map and search on map about useres. * User can see status of useres (online - last seen in X minutes - hourse or date ). * User can block any contact . - Useres profile page , when user click on any contact he can see user profile photo status and age other information like hoppies . - User can send text emojies , video or photo or any type of docs and voice message no call or video conversation required in this project. -History Chat screen . * user can see list of all useres he talked with them and he able to reccontact them again. * User can block useres or add them in favourite list. * User can see another useres location - friends/favourite screen. it is will contain all favourite useres like history chat screen. -settings screen, user can do following . * user shall chnage his profile. * USer shall change his birth date for one time only. * User shall change hoopies list . * User shall see block list , he able to revoke block. - admin application will contains following: * admin can seatrch useres based on GPS coordinate , or country . * admin can send message like ads , it is will appear as first message of user in greate view for limited time. * ads message can be for specific country. -application must support push notification . -all useres in application will have User role. -one or more useres will be on admin role admin can ( terminate any user for limited time ). -application must be responsive and support mobile and tablet. - User can backup chat on Dropbox . Technical requirments : -application backkedn must be build using asp.net web api using https and Oauth2 . -application mobile is cross platform using xamarin forms . - developer must following MVVM pattern. -application must be simple and nice UI/UX. -application will target android and iphone (iphone maybe in diffren release ). -this project wiill be created and send it to developer using visual studio 2017 . -developer must send his code every two days to check quality of code and if it is best practices. -i will use trello or Jira as task management tools