What we mean by a household

Sharing shipped last week, and it took far longer than it looks. The hard part was never the invitations. It was deciding what a household is when two people disagree about a receipt.

We started from one rule and derived the rest of it: the budget owns the entries, not the person who added them. Most of the design follows from that.

What follows from that rule

• Leaving a household leaves your entries behind, because they were the household's spending, not yours.

• Anyone in the household can correct an amount, and the entry keeps showing who added it originally.

• Deleting a budget is the only thing that deletes entries, and only its creator can do it.

• Nobody gets a private category. A shared budget with secret compartments is not shared.

The request we keep turning down is splitting: half of this receipt is mine, half is yours, settle up at the end of the month. We are not building it. A household budget is one pot of money you are watching together, and the moment the app starts keeping score between two people in the same kitchen, it stops being a budget and becomes a ledger of small resentments.

If you need to split bills with a flatmate, use something built for that and point Coinbramble at the part of the money you actually share.