Perfect!

It works. Lag free and bug free. Uses space very efficiently. Clean and customizable interface. Can background. Has SFTP support. Also supports "open in" function. I cant complain, this app is near perfect. One feature I would like though is the ability to have two sessions open at a time, one ssh and the other sftp.

Update: Im stupid... Just looked at the third screenshot and discovered the "screen" section. Perfectly happy user.

Tested on a [jb] iPhone 6 running iOS 9.3.3

Player  about WebSSH - SysAdmin Tools, v13.2