Activity app on phone has my whole families activity.

Hi

For Activity tracking and various other features and services on Apple Watch and iPhone to work as intended by Apple, you should not share an Apple ID.

Each user should instead have a separate Apple ID and be signed in accordingly on their iPhone and Apple Watch.

Should you wish to share eligible past and future purchases (iTunes music, apps, books, etc), then you can still do so via Family Sharing (a free Apple service). Other features of Family Sharing include a shared family calendar, shared photo album and the ability to set reminders that will alert all family group members:

• iCloud - Family Sharing - Apple
• Set up Family Sharing - Apple Support

The following articles provide instructions for:

Creating a new Apple ID:

• Create and start using an Apple ID - Apple Support
• https://appleid.apple.com/account

How to use that new Apple ID on an iPhone:

• Sign in with a different Apple ID on your iPhone, iPad, or iPod touch - Apple Support

The person who sets up a new Apple ID should also first unpair their Apple Watch from their iPhone and then pair it again after the iPhone has been configured to use the new Apple ID:

• Unpair your Apple Watch and iPhone - Apple Support
• Set up your Apple Watch - Apple Support

Once you are set up with your own respective Apple IDs on your devices, you can also share Activity results with each other:

Share your Activity with your Apple Watch - Apple Support

It's time to stop sharing an Apple ID. They're designed to be used by one person only. You an use Family Sharing to share content.

Set up Family Sharing - Apple Support

Best of luck.