score:2
The AppStore description is not a reliable source of information. When I was in China a few months ago, the Baidu maps were only available in Chinese. You may use another phone with Google Translator from camera to learn basic UI.
My use case was:
You should be aware that VPN is not the only issue with the maps in China. All traditional maps will show 500m wrong location as a result of Government Restriction
I will recommend taking Maps.me as a backup, as it has English UI and does not require the Internet to work. (However, I am not sure whether Maps.me show right GPS coordinates in China)