The Priva Notification Center is Priva's default application for handling alarms of the Priva systems. It is included in most subscription packages. The Notification Center serves a slightly different purpose than Priva Alarms. Read more about the Notification Center here.
Priva Alarms has some features that are not (yet) implemented in the Notification Center (e.g. Alarm Scheduling). For this reason, you might still choose to work with Priva Alarms. Priva Alarms will eventually be phased out.