I am providing Android, iPhone, Web application and Website with design, Back end and CMS service. What you have to do: 1) Write your functionality that you need in application. 2) In which platform you need the application. 3) If you have any reference application which is help me to understand your application features, you can give me it. 4) if you can make rough sketch of screen of your application, that is much better for me get what you need.