iAP 家庭账户有哪些情况

In the context of In-App Purchases (iAP) and family accounts, Apple has introduced several features and improvements to manage transactions effectively. Here are some key points related to family accounts:

App Transaction ID: Each family member gets a unique App Transaction ID when they download an app. This ID is static for a given Apple account and app across redownloads, refunds, repurchases, or storefront changes. It is also included with any In-App purchases made by the customer within your app. This provides greater flexibility in associating customer accounts to App Store transactions.
Family Sharing: If your app supports family sharing, the App Transaction ID can be used for family shared transactions. It simplifies managing In-App purchases and associating them with customer accounts on your server.
App Account Token: The App Account Token is useful to associate a customer's account information with their In-App purchase. However, it is not available for Family Shared transactions.

These features are part of the updates to the App Store server APIs and StoreKit, which aim to enhance the management of In-App purchases and customer accounts, especially in scenarios involving family sharing. For more detailed information, you can refer to the session titled "Dive into App Store server APIs for In-App Purchase" from WWDC 2025.