Reminders
Reminders makes it easier than ever to keep track of all of your to-dos. Create reminders for grocery lists, projects at work, or anything else you want to track. Use flexible tools like Tags and Custom Smart Lists to organize your reminders to match your workflow, and save Reminders lists as templates to reuse them again in the future. You can also share a list with others to collaborate and work together.
Add tags. Add tags to organize your reminders. Click one or more tags in the sidebar to quickly filter reminders.
Create Custom Smart Lists. Smart Lists automatically sort your upcoming reminders based on dates, times, tags, locations, flags, or priority. Create Custom Smart Lists by clicking Add List, select “Make into Smart List,” then add filters.
Save a list as a template.When you create a list that you want to reuse, you can save it as a template. Select the list in the sidebar, then choose File > Save as Template.
See what’s coming up. The Today and Scheduled lists in the sidebar group items based on time and date. Keep on top of upcoming reminders and make sure you never miss a beat.
Use smart suggestions. Reminders automatically suggests dates, times, and locations for a reminder based on similar reminders you’ve created in the past.
Collaborate on a list. You can send an invitation to collaborate on a list in Messages or Mail, or copy and share the link. Click 
in the tool bar, choose Collaborate in the drop down, then select Messages, Mail, or Copy Link. If you share in Messages, everyone on the thread is automatically added to the list.
Assign responsibility. Assign reminders to people you share lists with, so that they receive a notification. Split up tasks and make sure everyone knows what they’re responsible for. To share a list, click in the menu bar and choose how to share.
Organize with subtasks and groups. To turn a reminder into a subtask, press Command-], or drag it on top of another reminder. The parent reminder becomes bold, and the subtask is indented underneath it. You can collapse or expand your subtasks to keep your view uncluttered.
To group reminders together, choose File > New Group. Name the group whatever you’d like. Add more lists by dragging them into the group, or remove them by dragging them out.
See what you’ve completed.The Completed Smart List in your sidebar lets you see all of your finished reminders, including when you checked them off.
Get reminder suggestions in Mail. When you’re corresponding with someone in Mail, you can use Siri to recognize possible reminders and make suggestions for you to create them.
Add a reminder quickly. Use natural language to quickly add a reminder. For example, write “Take Amy to soccer every Wednesday at 5PM” to create a repeating reminder for that day and time.
Siri: Say something like: “Remind me to stop at the grocery store when I leave here.”
Learn more. See the Reminders User Guide.