Where is kryptkey? I don’t see it on F-droid.

I do see KryptEy, which sounds like the same thing. What’s important to mention is that it’s a proof-of-concept app that hasn’t been updated in two years. It may still function fine and be secure, but I wouldn’t necessarily assume that, especially when we are talking about high stakes like avoiding government intrusion into chats. Has anyone ever checked or audited it?