Signing in
The tablet only signs in. It does not create a household.
Type the household email and password, then tap Sign in. There is one login for the household, shared by the family.
If you were sent a temporary password, pick your own after you sign in: Household › Household login › Change password.
Remember me is on by default. It keeps the email on this tablet so the next person does not retype it. It does not keep the password. Signing out leaves the email in place.
A new household is created on the Loelia website, then you sign in here with that email and password. The website address, as plain text, is loelia.app. This help page does not link to it.
The release app talks to the Loelia service on its own. There is no server box on the sign-in screen.