Is this just not doing the same as the app currently does? It takes your location and provides a number of filters based on that. I'm not sure how them providing a filter around uber's location is any different, in regards to a users's privacy, to them providing a filter when you are in Paris for example
All of their "satisfied customers" look to be just random stock photos that appear on a bunch of different websites I am not sure I would be keen to hand my keys over to them