With Family Setup, you can use your iPhone to pair multiple watches for your children or older adults who don’t have their own iPhone. So everyone can stay in touch by Phone, text message, or Walkie-Talkie. They can also do things like play music, find apps, and close their Activity rings. It’s more independence for them, and you have the comfort of knowing they’re just a call away.
Note that some Apple Watch features depend on having a companion iPhone, and aren’t available on an Apple Watch that you pair with, using Family Setup.