Probably the best iOS has to offer – SSH Term Pro Review

It does the job, but: 1) I can't find any way to submit a bug report or get help outside of Facebook, which I do not use 2) the home and disconnect icons obscure text when using vi 3) it won't connect to hosts with AAAA DNS records from an ipv4-only network and 4) part of the scrollback buffer is visible at the top of the screen on an iPad in horizontal mode. That said, good SSH clients are hard to find on iOS and so far this is by far the best I have found.
Review by Rryjnbyidkr on SSH Term Pro.