Shellfish is underrated. It has a very convenient tmux integration (auto-restore a specific tmux session per host to work around iOS suspending background apps), supports SSH tunneling via other configured hosts, and can be used as an SFTP file provider for other iOS apps. It’s also generally polished and supports the expected standard terminal features.

There’s a few settings I wished were possible, like using volume buttons as modifier keys in Emacs (I’ve heard about this in other apps), but mostly it works fine.