I am looking to create an iPhone application that determines a user's location and display predetermined locations in relation to a user. The user should then be able to make in app purchases based on the location that they select. I already have graphics for the application designed and have a solid idea of how I would like the application to look. Ideally I would like to create the application for iPhone first then I would be looking to build it for android. I would also like to like to be able to build new components into the application based on the pre-determined locations in the users proximity.