I have been trying to use the TripAdvisor app and found part of it inaccessible. I can search for a place, read reviews and start the process of submitting a review. When I click on the option to rate the place I am reviewing I hear Average Selected and I assume the rating is set to average but then I can't find a way of changing the rating. Is this part of the app not accessible or am I doing something wrong? Is there an easy to use alternative that will work on the IPhone?