In the Reminders app, use iCloud to share to-do lists. You can collaborate and assign tasks to other people who also use iCloud.
Note: All Reminders features described in this guide are available when you use .
Below Notify When, turn on or off any of the following:
Adding Items: Receive an alert when someone adds an item to the list.
Completing Items: Receive an alert when someone completes an item on the list.