This is a key feature of uber. I used uber in LA last year because I've used it in New York, Washington, Toronto, Singapore, Delhi, Sydney, Cairo, Brussels, Paris, Nairobi, Glasgow, London, Manchester, and many more cities.

When I arrive in town I don't research which app to download and register with to get the best solution, I use the one that is the path of least resistence, that's firstly uber, secondly a local cab that's on the street or that the hotel will call for me.