I don’t perceive Threema to have a significant network in the US, which is where a lot of HN’s user base is from.

Checking the iOS App Store I see they charge $4 upfront for the app, which must hinder its chances of adoption in new circles.

I do like the idea of paying for software, but it’s tough to succeed with it where large networks draw the life out of smaller ones.

I’d like to be corrected, though—I know the security has a solid reputation.