Have you downloaded third party apps on the Apple Watch only to find after a while that you don't use them very much and want to hide their icons? Here’s how:
Touch and hold an app icon from the Home screen and press the red X next to it. Or you can go to the Apple Watch app on your iPhone and show/hide apps from the My Watch section.
Even though you've removed their Watch interfaces, the apps will remain installed on your iPhone unless you delete them from that device, as well.
You can also rearrange apps on the Watch’s screen. You can do it directly from the smartwatch by pressing and holding an app’s icon, then moving it to anew spot. Or you can go to My Watch on the iPhone, then to App Layout. There you can arrange your apps as you wish.