From the user manual:
Apps Settings
The Apps list displays all preloaded and downloaded apps. Apps can be downloaded from the Google Play store.
From the watch screen, swipe up from the bottom of the screen to open the
Apps screen. � To scroll through the list of apps, swipe up and down. � To view recently opened apps, tap Recent apps.
Uninstall apps
Uninstall apps you have download.
1. From Apps on your watch, touch and hold an app. 2. Tap Uninstall. This option is not available for all apps