I paid for a subscription somewhere else, can I also use it on Apple TV?

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.

You should be able to find photos of the models here: http://www.apple.com/tv/compare/.

Apple TV (3rd gen) route:
- On a web browser, sign in to https://www.tastemade.com with the account (email/password) that you used to purchase your Tastemade subscription
- Launch the app on your Apple TV
- Go to Settings
- Select the "Purchase, Restore or Connect a Subscription" option
- Choose the "Connect Your Tastemade.com" subscription
- On the web browser, go to https://www.tastemade.com/activate, and enter the activation code shown on the Apple TV
- After entering the code on your web browser, the Apple TV will be associated with your Tastemade subscription


Apple TV (4th gen) route:
- Launch the app on your Apple TV
- Go to Settings
- Click on the "Sign In" button, sign in with the account (email/password) that you used to purchase your Tastemade subscription
- After sigining in, the Apple TV will be associated with your Tastemade subscription