Really like the app

Its really good Im just a bit confused how exactly does the timing of shows work because one show will be on there The day after it airs on TV and other shows what is still arent on there after they aired a week before if someone could get back to me and explain this to me I dont want to have to call customer service and talk to a bunch of operating machines

Jihadi2hotti about Xfinity Stream, v4.1.0