Family Sharing needs an organizer (adult/parent/guardian) who sets up the Apple Watch for family members using an iPhone.

You'll need an Apple ID for yourself and an Apple ID for the person using the Apple Watch.

Note: Your Apple ID needs to have two-factor authentication turned on.

• Apple Watch Series 4 or later with cellular
• Apple Watch SE with cellular, on watchOS 7 or later

• iPhone 6s or later on iOS 14 or later for the initial watch setup