How to extend the app to other phones [iOS]
The app supports the Family Sharing feature, which means that the app can be installed on other devices on the Family Sharing list.
This function does not provide data sharing. The app is shared using the iCloud feature, and it works when you use the same Apple ID on different devices.
What types of content can you share with your family?
These sources may help you:
Set up Family Sharing
Manage Family Sharing Settings
Add a member to a Family Sharing group