App for friendly bet tracking

I'm looking for an developer to code an iOS application. Most of the database is already made as there is a website with php webapp associated. Most of the logic should be coded in c++ or explained to us what programming language would be best, in order to be reused in a future android version. The app will have : - a system to login and register via app with email confirmation or facebook - a betting system (already coded in php, object oriented, for the webversion) - simple friendship system (already exist in webversion, Webview system to be discussed ) - a personal settings zone to change information about the account