Simple Ipad application

A simple Ipad application is needed. This application serves like a library, where the user can search or pull out document (pdf format) and open it on Ipad. This app should also be compatible with other tabloid devices (if possible?) I would also like the app to be password protected (some if not all contents)?--I'm still thinking over this one. The designer will be in charge of: -Developing the appliation. -Make a short demo on how does the Admin to maintain the backend. -Launch the app on apple store.