This process works differently, depending on which model of Apple TV you own.
How can I tell which Apple TV model I own?
Apple TV (3rd gen)
This model comes with a small silver remote and there is no way to add apps to it.
Latest Apple TV (4th gen)
This model comes with a remote that has a trackpad on the top part, and has access to Apple's app store.
Before you purchase a subscription
While purchasing your subscription through your Apple TV, you will need to:
If you already purchased a subscription through your Apple TV (3rd gen)
Prior to purchasing a subscription through the Tastemade app on your Apple TV (4th gen), you will have to create an account. You can use this same account to sign in on our website to enjoy your subscription through your browser.