Just ROFL.
I warned that e-Chat is most likely a scam. I've been banned from telegram channel for that.
Now, go to their website and take a look at "Downloaded app XXXXX users"
I noticed that the value increases every second. "Maybe it requests some data via AJAX", I thought. Well, I checked network queries - empty. Alright, let's explore the source code.

We see a span tag with "download counter" id. Somehow the text inside it is being changed. How?
That's how.

Here's a proof that they are (a) Russian, and (b) scammers.