Build an app from existing code

The project would be to take this website ([login to view URL]) and make an iPhone app for it. Source code is here ([login to view URL]). I would want it the same as the website apart from the ability to locate the person via GPS and to use a better map if possible, such as Google Maps. It would probably help if the map was local to the device so it wouldn't take as long to load. It would be on the App Store for free but it would still be your responsibility to make sure that the use another map provider didn't break any laws/ToS. If possible I would like to know the price for Android and Windows versions and in what language you plan to code. N.B. The budget is not indicative of what I'm actually looking for but it didn't meet my requirements so please email with quotes. Email if you need anything. Thanks