Adding Apple TV to my television

If this is about the Apple TV set-top box:

• Set up your Apple TV - Apple Support

If this is about the Apple TV app on your smart TV:

• It depends on your brand and model TV, if that is currently possible. Apple TV app-supported devices - Apple Support

Download and install the Apple TV app - Apple Support

If this is about the Apple TV app on a third party streaming device (Roku, Fire TV):

• It depends on your model streaming device, if that is currently possible. Apple TV app-supported devices - Apple Support

Download and install the Apple TV app - Apple Support

Devices you can use with the Apple TV app and Apple TV+ - Apple Support