Applications within the same app groups can easily share data. A development may have one or more app groups for the applications, and one application may have multiple app groups as well.
To get app groups:
- Visit Apple’s iOS Developer Center and log in to your account.
- Select Certificates, IDs & Profiles.
- Select Identifiers > App Groups and click the + button to create a new group.
- Enter a name and an identifier for the new group and click the Continue button.
- Click the Register button to create the group.
- Click the Done button to return to the list of registered app groups.