Update: the next update fixed the problem. It’s back to be the best ssh client for iOS, with support for key-based auth, mosh, and other nice things. The horrible new icon of acidic color is still here, though, and it doesn’t fit visually anything on my iPad, so changing the rating from 1 star to 4, not to 5. "Gigantic" update apparently broke ssh login with key-based auth. 'ssh2' works perfectly for my hosts, but 'ssh' now doesn't seem even try key-based authentication. And mosh is also broken now (failing with nonsensical "cannot find IP address" message).