I think editing messages would be a bit difficult and imo not necessary because the messeges are encrypted.
For editing you would have to encrypt the new content again and manage to place the messege were the old was.
That it only has a web client isn’t thaat bad for me but I understand it.
The third point would be solved if it would be free but tbf is better than others (not all ik)
I am not exactly sure how it is with the perfect forward secrecy.
I think you have both keys for ever on this account so ok.
I think group chats are not supported till now, would be nice though.
And sadly timed/exploding messages are not supported too, so I agree with that too.
And I like optional uncompressed images/ videos too.
I mean Threema is maybe a bit more private (you know phone number given or not given).
I think its on the pretty much on the same level as Signal in terms of privacy. I will to keep Threema too as long as I have at least one contact.
Indeed, at least a free trial would be great.
Do you know a magic trick to convince people to buy Threema?
And do you think that if I get them to Signal that they would be anytime more privacy concerned so they consider going to Threema (if Threema is the better choice then)?
Edit: I wanted to add that I see more and more privacy and security concerned people.
AND I have Signal installed to I am not hating the Mr. Robot featured messenger