It is a public household book that can be seen and used together with several people.You can conveniently log in and use your cacao account.You can invite your friends in two ways.1. Invite your friendsWhen you invite someone to your household, you can choose your friend.However, only friends who have agreed to provide a list of friends will be listed.* To agree to the friend list, click [Settings]> [Allow]> [Friend list].2. Enter a unique numberAfter creating a household account, enter -> Select [Administration] tab -> [Invitation by unique number] -> Enter a unique number (the unique number is displayed on the list screen after signing in)