Haw to add hbo max on Apple TV with Roku

HBO Max needs a separate app, and is not available as Apple TV app Channel.

Unfortunately, it is not available in the Roku Channel Store at this time. You’ll have to wait until Roku and WarnerMedia come to an agreement on the inclusion of the HBO Max app in the Roku Channel Store – or use a different device.

Which devices work with HBO Max? - HBO Max Help Center