Examine Iphone Shopping App + Explain How it Works

I am looking for somebody experienced with developing iphone Apps to download 2 separate shopping apps from itunes (free apps) and examine how they work, what they do, etc. Both apps are very similar. You will need to create a video of you using and explaining how each app works. You will then be required to explain what work would be required to create an app with similar features - basically a job specification to develop the app, what skills would be required, what functionality would be required, etc. Requirements: - Experienced app developer - Good English skills - both verbal and written - Access to video camera