How many devices can my Apple TV account support?

Your Apple ID account can be used on 10 devices (iPhone, iPad, Mac, PC, etc.), 5 of which can be computers. I don’t think there is a limit for streaming devices such as the Apple TV set-top box, third party streaming devices (Roku, Fire TV), and smart TVs with the Apple TV app.

Content can be streamed to a limited amount of devices simultaneously, depending on which service is being used. An Apple TV+ subscription can stream to up to 6 devices simultaneously. Other Apple TV app Channels may have a lower limit (3).