Uber works in Shanghai but is not as popular as Didi and certainly far from being used as widely as it is in other countries. Also, as both of them have merged, when you request a car with Uber, you are reaching pretty much the same pool of drivers as if you were using Didi. On some occasions, you might get a driver faster with Uber as less people are using the app. The price is similar to Didi but you have fewer car categories to choose from. Also, unlike Didi App, Uber China’s app is only in Chinese and there is currently no English version available.
Read our article about Didi <here>.