Yea of course 
thanks 
here a short vid about the file transfer
it’s the same for 1:1 or group. I click on send and nothing happens
Well nevermind. I came to the conlusion to keep looking for another anonymous messenger, this one is too buggy.
I tested the group chat with 2 phones, and at first it was working, then all of the sudden one of them couldnt receive the messages anymore.
It’s not reliable unfortunitly. It seems this app is still beta in development, and not a finished product.