We love that you would like to share Abide with your family!
Please know currently since the release of iOS 14, there are new guidelines for participating in Apple Family Sharing outlined by Apple. Abide app does show in the Family library of apps once it's downloaded by a family member, and iTunes considers Abide a 'Family Sharing' app, however, the Abide in-app products are not eligible through iTunes.
With that being said, we honor the Family Share plan across all smartphone plans! Please reach out to the Customer Support team and we will have your family up and Abiding with us in no time!