$app_open) corresponds to the opening of the app and app resume event (when the app becomes active again)$app_install)$app_update) $app_install) is triggered the first time an app open event is received for a user, regardless if the user is new or existing.$app_update) is triggered when the SDK version, app version or OS version changes from one open to the next.APP_VISITIN_SESSION: This value should be used if you’re making one API call per tracked event (recommended way). The platform will automatically aggregate all the events of a session sent through many API calls when this value is used.
CLOSED_SESSION: should be used only if you do a single API call per session at its end. In this case, you should provide ALL the events of the session in the $events array in the call. Each API call with this value will generate a new User Activity in the Platform.mob:ios:raw:6d92078a-8246-4ba4-ae5b-76104861e7dc for a raw IDFA on iOS platform.