Moving in together, keeping your own
An example, with sample figures.
Two earners, your own accounts, and now there's rent.

You make a Household and add your partner. Your own accounts stay in your Personal. When either of you pays the rent, it shows in the Household, with what each of you has put in.
A cost on your own card can be shared in from your Personal. If you'd rather pay each other back, the space changes with one answer.
Worth knowing
Your partner sees everything in the Household. Two Personals connecting banks are two subscriptions.
Share a space