Stick with IRC999.

Noticed this app was (at least temporarily) now free, so I decided to give it a shot.

Only able to connect to one server, still lacks a lot of features... But the killer is absolute zero multitasking support.

It does have a "Send" button apart from the keyboard, though, unlike IRC999... so it gets one extra star for that.

Stay away, especially if it stops being free.

Elebreed about Mango IRC - Chat client