I use both the iPone & iPad version.
It does not always work in the iPad when I add a verse to my Favorite. This is what I have observed:
1. The favorite is never created
2. The created favorite is not the right one. I can be on 1 Chron and the created favorite will be in Isaiah. Dispite the verse on the little pop-up where I press the "Add to Fav" says 1 Chron.
Any idea why? This does not happen in the iPhone version.