Iphone App UI - template (graphic design)

- I am looking for clean, stylish, design for an iphone app. - The app function will be very similar to GoCatch or Uber but looking for innovative layout and function that is intuitive, sleek and appealing. Really like functionality/feel of circle but maybe a little to high tech for this ap. - What/who I am looking for? Would like to see prior work (especially innovative designs) and proof that I should hire you. Ideally I would like to see some mockups. Any ideas you might have or similar apps you have developed. - How will it work? Once I have found the right designer I will want to work with them to turn my process flow into mock ups (probably around 50 -60 different screen samples for developer). I have some basic mocks for function but want ideas on how this can be the best in class (taxi app) - Price: Would like to get a sense of how much full mock up will cost for 50-60 screen - I will provide $50 to the person who proves they have the right skill set and work with them to develop a quote a for the full brief (at this time wireframes will pass) - Additional info: I am not worried about the designers ability to build the app, I just want the best design (that can be developed) - would prefer a profressional graphic designer who gets function, form and feel