Howdy,
I'm a newbie so please excuse any posting faults...
I use BIAB on a laptop when performing; love the functionality but cumbersome. I've noticed that cruise ship performers use iPads or tablets which are much less obtrusive. I display both the Chord Sheet, and the Lyric Document windows simultaneously.

My suggestion is to allow dual windows to be displayed in the iPad for performers. I have .docx and .pdf versions of screen shots of how I do this on my laptop, and how I would like to do this on my iPad, but neither format is supported here frown