Crear una aplicación para iPhone y Android

I need to develop a simple iPhone/Android app that recibes notifications from a "page/server" and show them like whatsapp messages. What I have: - A simple shared hosting (1and1) (not a server) - I have an iPad app that send data to a mysql database (in 1and1 hosting) through POST method - I have a webpage that analiza with javascript the data and show them in real time and also create notificaciones (now stored in the database and displayed in the same page) - The design of the app (see attatchment) What I need: - The iOS/android app that recibes and display the notificaciones and messages from the "server" - The client can't register, the app its only for clients, so they all are going to receive the login data and they olny have to login once in the app (save the login as Facebook app) - The app recibes information from different stores so the messages and notifications came from different "senders" (but all sent from the same "server") - The app its only for receive messages and notifications, not send anything - The messages and notificacions are text and pictures (almost all just text) - The messages and notificaciones have the slide option to send them by text or mail (using phones native messages and mail apps) - "something" that sends the notificaciones and messages to the clients based on their profile (all profiles are created on the database) Deliverables: - The iOS and Android projects to publish to the appstore's Please send the cost for both parts, "server" and app, specify what i need for "server"