The environment of an iOS device, Production or Development, is determined by the APNs (Apple Push Notification Service) certificate associated with the app build. This directly affects push delivery and user categorization.
A user is considered a Development user if the app was installed using a build signed with a Development (sandbox) certificate.
Check a user's environment
You can identify whether a user is in the Development or Production environment through two methods:
User’s profile page
On the user profile, the push token section shows whether the token is marked as Development or Production.
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Test devices page
Devices added as test devices will clearly indicate the environment.
