Coding in Ocjective-C for iPhone/iPod/iPad exam application

Hi there, We are looking for developers for an iPhone/iPod/iPad application, which whilst simple requires excellent coding for a sophisticated, intuitive and engaging user experience. Full project details will be given if accepted, but we require a user to be able to answer questions displayed on the screen, with scores and percentages displayed. We also require the ability for users to choose from different categories of questions or to have an 'exam-style' set of 50 questions with a result at the end. It is also important that there is a way to ensure the same questions are not repeated twice, with an option to allow repeat questions if desired. The app must also integrate with our website which is currently under development. It must also have a simple way for adding more questions and categories in the future. Payment would be on accomplishment of milestones, which will be fully discussed before we proceed. If you feel your team would be able to provide this service please bid and we will let you know if you are successful.