I find it useful to have my tablet to use in some singaround sessions I go to where we all join in--I can have the chords and words to songs I do not play often and can find them quickly. We also use them at church so that we all have all the songs in the same arrangements.

I use Songbook, a very cheap but functional piece of software (and you can try it free), that is available for mac, windows and android. It uses the standard chordpro format, and has a utility that will convert "chords above text" style to chordpro format easily (but watch if you import from a text editor that the chords line up properly as it will change the font to a non-proportional one first).

For church, we also use a common, shared dropbox account as Songbook will automatically sync with one. Also nice that it will scroll long songs for you (you can set the rate).

One caveat: I use android and windows versions (I find it easier to edit on my laptop) and have different directories set up for my folk and church music, but I haven't yet been able to find an easy way to do that on an iPad, but then I don't use one so have only tried helping someone who does.

You can find the software here