Members of the household create seperate logins and passwords but have the same level of visibility and access to manage accounts, transactions, and budgets.
Invite a new household member to Monarch by clicking on the arrow next to your name. Then go to "Members" and click "Add Member". They'll receive an email invite and you'll receive a confirmation email when they've accepted.
You are unable to invite someone who has an existing account. They will need to use a different email address and start a new account, or delete their existing Monarch Money account.
You can not yet invite others through the mobile app.