I don't use my Iphone much for Logos, but the other day I left my Bible at home and tried to use my phone in Church. I was on wi-fi. So, none of my sources would show up...at all. I saw them there, but when I clicked on the source, the screen was just blank...pure white. I deleted the app and reinstalled. Same thing. Do I have to have the item downloaded on the phone? I thought it was cloud based.