This application has as many downloads ?

I see this application on ranked news apps. The first version was uploaded on 4th June. The app has between 500.000 - 1.000.000 downloads in less than 20 days. The app has more than 25.000 reviews.

This is the link of the app:
https://play.google.com/store/apps/details?id=com.jumpstarts.manor.molecatcher

How he get that stats in a short period of time?