Apple watch really needs screen time settings for kids who have their own iphone and watch app or even adults.

Set up Screen Time

Use Screen Time to configure controls for a family member’s Apple Watch. With Screen Time you can schedule time away from the screen, and limit both contacts and the apps your family member can use to communicate with those contacts. You can also impose limits on iTunes Store and app purchases, explicit content, and location information.

To set up Screen Time, follow these steps:

1. Open the Apple Watch app on the iPhone used to manage the watch.
2. Tap All Watches, then tap the watch under Family Watches.
3. Tap Done, tap Screen Time, tap Screen Time Settings, then tap Turn On Screen Time.
4. Select settings for Downtime, App Limits, and Content & Privacy Restrictions.