Convert Android app to iOS

The project is for writing an iOS app that functions exactly like the following Android app: [login to view URL] The Android source code is available if you need it. There are two versions of the application, one that is free and ad-supported and one paid. Both need to be implemented for iOS, with advertising for the paid version included in the free version. The app uses a web service to deliver messages to an email address. The iOS version should work the same way and contact the same web service (it's a simple XML POST). There are some basic security features to prevent malicious users from abusing the web service. Feel free to ask questions if anything is unclear. When bidding for this project please provide examples of other iOS apps you have developed.