Current HBO NOW customers and people subscribed to HBO via the Apple TV Channels feature and iTunes billing will be upgraded automatically to HBO Max at no additional charge.
Get HBO Max on Apple TV [Hassle-Free Guide]
HBO Max for iPhone and iPad rebuilt with SharePlay, stability updates, more - 9to5Mac
Apple TV Plus: Is it worth it? Everything you need to know.
Roku 4K Devices Add AirPlay 2: New HBO Max Streaming Workaround
HBO Max: Stream TV & Movies on the App Store
Max: Stream HBO, TV, & Movies on the App Store
HBO Max: Stream TV & Movies on the App Store
How to get HBO Max on Roku, Fire Stick, Apple TV, and other devices
Apple refreshes tablet line-up with iPad, iPad Air upgrades: Details here
How to Use the Apple TV App on Your Mac
HBO's Max Streaming Service to Natively Support Vision Pro at Launch - MacRumors