Create Moblie App from Website

We would like to create a mobile app for our church from our website ([login to view URL]) that will take all of our information, including videos ([login to view URL]) and audio, and translate it into a mobile app for the iPhone and Android markets. It needs to be very simple for us to upload information to the app Our website is very simple (we use [login to view URL]), but effective and we want the same from our mobile app. We would like to have this completed within 30 days. We want to create buttons from the various tabs on our webpage and, if possible, have that information automatically be updated when we change our webpage. We can discuss the particulars. Again, we are all about simple, but we want it to be very functional, with a modern design, and informative. We will only contact those whose proposals we are considering.