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 on your iPad.
View the list you want to share, then tap on your iPad.
In the shared list, create or edit a reminder, then do either of the following:
Type @ followed by the person’s name or choose a person from the menu above the keyboard.
Tap , then tap Manage Shared List.
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.