The main purpose of this calendar is to be used by busy families where it is difficult to keep track of all the events going on. This creates a common place where events, work schedules, and notes can be added and viewed by anyone who is authorized. You can sign into the same account from any android device with the app installed. Users can have multiple calendars with different authorized users on each one, which creates a way to categorize data. For example, you might have a family calendar and a work calendar.