As a heavy user of SSH to manage computers and IRC via command line clients, the most used application on my phone besides the web browser is a SSH client. Previously I have used Prompt and it worked, but barely. My issues with Prompt include crashing on emoji spam that is common in certain IRC channels, very slow terminal rendering to the point that watching the output of compiling a large package will cause Prompt to lag uncontrollably for tens of seconds, and a relatively un-intuitive UI.