Hail O Taxi app

I was brought to my attention today an app called Hail O for hailing cabs in London.

The UI and UX is a pleasure on the eyes with the aesthetics simple yet its plain to see that real care has been taken by the designer. The subtle gradients and icons used.

Was also impressed with its ease of use and the idea behind the app that Cab drivers could adopt this SDK and work with it on picking up people.
The idea that you could see the cab drivers face before your picked up is a comforting feature.