How to close apps on your Apple Watch, or force-quit apps if necessary

To close apps on Apple Watch, press the side button and swipe left.

How to close apps on your Apple TV, so nothing is slowing your system down in the background

You can only close apps on the Apple TV 4K and Apple TV HD, as other models don't run apps in the same way.
CNET on MSN

New Apple Watch? Start With These 8 Essential Features and WatchOS Settings

I recommend these features and settings to everyone who's just set up a new Apple Watch or wants to get more out of the one already on their wrist.

iOS 26 Adds These 200 New Features and Changes to Your iPhone

Apple's website offers a list of nearly 200 new features and changes (PDF file) included in the software update, released ...