I’ve already subscribed on my iOS device but I’m being asked to purchase again on Apple TV. Why is this?

This is most likely because you are using a different Apple ID on your Apple TV, to the Apple ID that you originally used to subscribe to Hopster on your iOS device.

Important! - To ensure you don’t end up subscribing twice, make sure you’re signed in with the same Apple ID as you originally used to subscribe to Hopster. This Apple ID can be used across multiple devices.