In Monarch you can invite others to join your account!
All members of the household have the same level of visibility and access to manage accounts, transactions and budgets. Each member has their own unique login and password, however.
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.