Family Sharing (Apple)

Apps that offer auto-renewable subscriptions and nonconsumable in-app purchases can enable Family Sharing, which will allow users to share their purchase with up to five additional family members. You can choose which of your in-app purchases to allow Family Sharing for in App Store Connect.
Whether or not a user’s purchases are automatically shared with their family members depends on the type of in-app purchase, the user’s sharing preferences, and if the purchase was made before or after Family Sharing was turned on in App Store Connect. Users have the option of turning off Family Sharing in their subscription settings at any time.

		Auto-renewable subscriptions								Non-consumable in-app purchases
New Users		Family Sharing is enabled by default depending on the preference set by the purchaser in Manage Subscriptions.								Family Sharing is enabled by default if the following conditions are met: - user has purchase sharing enabled. - the user's family members are sharing payment. - the app is not hidden from the user's purchase history.
Existing Users		Users must opt-in to Family Sharing from within their manage subscriptions page.								You can unlock access to the in-app purchase using receipt validation or App Store server notifications if the following conditions are met: - user has purchase sharing enabled. - the user's family members are sharing payment. - the app is not hidden from the user's purchase history.