The Alarm app allows you to set alarms, set timers, and run a stopwatch on your PC. The alarms and timers create notifications that wake the system from standby and display notifications on the lock screen.
The Alarm app collects information needed to set alarms and timers and to display notifications on the lock screen. If you choose to create a specific notification, the notification is displayed on the lock screen, which others can view without being signed in to your PC. The information is stored on the device and is not sent to Microsoft.
The information collected is used only to enable use of the Alarm app.
You can choose not to create specific alarm notifications, or you can choose to turn off all lock screen notifications.