Ran into trouble with the main iOS DigiBall app. I took it to the pool hall the other night and had a buddy download the app on his iPhone. His phone couldn't find the ball. It only worked on my iPhone, so I just had him borrow my phone while I was playing a set with a regular CB.
Just now at home, I downloaded the app to my iPad, and it too could not find the digiBall. I turned off bluetooth on my iPhone, but the iPad still couldn't find it.
I expect this to be passed around at the pool hall, and it should probably be easy to switch which phone/ipad it links to.