I'm glad this information was here because I was wondering about that setting and how it worked (or not).
I've noticed that photo sites are generally slow to get apps done. Photobucket recently made an ipad/iphone app available and it works very well. That is what we will continue to recommend for those needing mobile uploads unless the PP one becomes available at some point.
If you are integrated with a board and you have Tapatalk on it, you can just attach photos. It's not as good as having your pictures within pp but it serves the purpose.