Chinese photo app gone viral

App in question:

https://sensortower.com/ios/us/hightalk-software-corp/app/mo...

What's interesting is that it is not localized for the US, but people are still downloading it and it's getting tens of thousands of downloads a day nevertheless. Interesting and somewhat similar to Bitstrips (https://sensortower.com/ios/us/bitstrips/app/bitstrips/69470...) which also suffered terrible reviews but managed to stay on top of the rankings for a while.