In this article we will go over sorting by age within your smart lists.
What You Need:
In order to sort by smart list, you need to have collected the users birthday. Other than adding it manually, you can do this by adding a Date of Birth field within your form.
Navigate to Contacts > Contacts / Smart lists (1) > Click on "More Filters" (2)
Select the "Age" filter
Add your criteria and your contact list will update accordingly. You can now optionally save your list if you would like.