Amp, maps service provided by AutoNavi, just updated its Android app which has integrated a plenty of location-based life services such as taxi hailing and restaurant reservations.
Partering with Didi taxi service, Amap users can see taxis nearby on the map and hail one directly by clicking on a button on the top left corner(see image below).
As to the restaurant reservations feature, it shows restaurants near to a user and whether group-buying or coupons are available. Reservations can be made within the app.
It also added real-time bus arrival information and updated the parking spaces database.
That is killer app.
Sacramento Taxi