I'm trying to add Investigative Discovery on my roku. I don't have cable. It's not allowing me to
According to their website (https://www.investigationdiscovery.com/general/faq), "The apps are free to download, but in order to watch most of the episodes you'll need a TV subscription through a cable, satellite, or some other provider."
I can't speak for ID, but many channels require you to have a cable TV provider to watch their content via Roku.
According to their website (https://www.investigationdiscovery.com/general/faq), "The apps are free to download, but in order to watch most of the episodes you'll need a TV subscription through a cable, satellite, or some other provider."