Be sure to cancel before the trial ends. The price following the trial is $17.99 per month.
Credit to Frunk
Offer expires on 11/30/2026. This is a promotional offer and is not for resale, has no cash value, and will not be replaced if lost or stolen. Valid only for Apple TV in countries where Apple TV is available, except the unavailable countries/regions listed below. Valid for new and qualified returning subscribers only. Apple TV subscription required. Requires Apple Account with payment method on file.
Apple TV renews at your region’s price per month after the promotion until canceled. Payment will be billed to payment method on file and can be cancelled anytime at least a day before each renewal date in your service account settings. Terms and Apple Privacy Policy apply; see the applicable terms for your country at https://www.apple.com/legal/internet-services/itunes/ww/. Must be the minimum age required in your country and in the country that matches the store front on which you are redeeming the offer. Compatible products and services required. Apple is not a sponsor of this promotion. Apple TV is a service mark of Apple Inc. registered in the U.S. and other countries and regions.
Don't wait until the end of the trial to cancel - just do it straight away.
You will still get the full trial and don't need to remember to cancel at a later time.
The deal I posted 6 months ago is still current until the 31st Dec as well.