To share a list, first view the app in List View, then tap on the list you wish to share and select . In the sharing screen, invite your friends to share the list by inserting their names in the text box above and choosing them.
If your friends are already using Any.do, they will receive a notification in the Notification Center that you have invited them to share a list with you. If they are not already using Any.do, an email will be sent to their inbox. As soon as they accept the invitation, you will be informed in your Notification Center.