iReal Pro works with an external keyboard (Apple Smart keyboard, or paired wireless).
This can make it much quicker to edit or create a new song, or to use your iOS device remotely (for example in live performance where you might be a small distance away from your device).
You can use the keyboard for triggering play, stop, next song, changing tempo, (soft) transposing, changing styles etc.
Holding down the command key (iPad only) will show the shortcuts window (there are separate shortcuts in the Editor).
Within the Editor, you can enter chords by typing on your external keyboard, use key commands to add a single barline, change font size, move the cursor to any space, delete or add beats etc.
(Note: when in landscape, the virtual keyboard may block seeing the full screen of shortcuts.)