Internet, electricity, that mystery bottle of olive oil. Living together gets easier when the math is automatic — and the kitchen accusations are fewer.
No credit card required. Whose turn it is to clean is still your problem.
You probably know the drill. We just made the math part vanish.

Give it a name like "Mountain trip" or "Group sushi night". Add the people who will be in on it.

Everyone in the bill can add expenses live. Updates show up instantly for the whole group, no refresh needed.

See who owes who, in plain numbers. Settle up before anyone gets weird about it.
I used to lose friends over twelve bucks. Now I lose them for completely unrelated reasons.

Jack Hard Rock
Beer Drinking Legend