Help & troubleshooting for channels on your Roku device, including adding/removing channels, logging in to, authenticating, or activating a channel, channel-specific playback issues, assistance contacting channel publishers to report issues, and adjusting channel-specific settings.
If you have a subscription through a channel provider, you should be able to use other devices to watch their content as well, as long as the channel provider supports those devices.
For more information about that a channel's functionality and supported devices, you'll want to contact the channel's support directly to inquire further. Many channels on Roku are developed and maintained by the channel provider themselves.
Re: Using Roku subscriptions on non-Roku devices like Fire TV Stick
Danny, I bought starz thru Roku and can only get to it on Roku app not starz account....so since no Roku cannel on fire stick am stuck watching on computer. Unless a solution, I'm cancelling thru Roku and going to starz directly.