Crear una aplicación para Android que

Aplicacion que alerta al usuario cuando está proximo a una ubicación Mobile application which alers user when arriving at destination. 1) the user can register via a simple registration sistem in php/mysql. Facebook/G+ Log in 2) User can specfy an address or select a predefined waypoints as destination 3) Pre defined destinations can be added from an admin panel (php/mysql) 4) User is alerted when destination is close 5) User can select the proximity in which the application is going to aler the user.