Cozi is a free mobile app and website that helps families stay organized. Its features allow multiple family members to manage appointments and schedules with one account, as well as organize and update shopping and to-do lists.Cozi also provides articles and recipes of particular interest to modern families.ozi offers an ad-free version of their app, called Cozi Gold, as an in-app purchase. Cozi Gold's additional features include Cozi Contacts, Birthday Tracker, more reminders, mobile month view, change notifications, VIP customer support and more.