Using a fire tv

Hi Bollockybill,

Thanks for contacting Apple Support Communities!

We understand that you need help to renew your Apple TV+ subscription.

Since Fire TV doesn't allow purchases, you can reference this article which will show you how to subscribe to Apple TV + at tv.apple.com via a web browser: Get Apple TV+ - Apple Support

"How to get Apple TV+

You can subscribe to Apple TV+ at tv.apple.com. Or subscribe in the Apple TV app on an Apple device, smart TV, or streaming device that's compatible with the Apple TV app. Learn which streaming devices are compatible.

Go to Apple TV+

1. Open the Apple TV app. If you're using an eligible Apple device, a message might ask you to to redeem your Apple TV+ promotion.
2. If you can't redeem your promotion, make sure that you're eligible.
3. Select the Apple TV+ Originals tab.
4. Select Sign In and Start Free Trial. Or you might see a Get Apple TV+ button or Start Free Trial button.
5. Sign in with the Apple ID and password that you use to make purchases.* If you donʼt have an Apple ID, select Create New Apple ID, then follow the steps to create one. Forgot your Apple ID?
6. If asked, confirm your billing information and add a valid payment method. Then select Confirm. If asked, agree to the terms and conditions.

* If you can't to subscribe to Apple TV+, you might need to get your Apple ID ready for purchases."

Take care!