Free tools for working out who owes what — when an even split isn't fair, when the bill has fifteen items on it, or when a whole trip's worth of costs needs untangling. No signup required for any of them.
If everyone is paying for the same thing, split it evenly and stop — the arithmetic is rarely worth the conversation. Reach for a calculator when people got materially different things: one room has an ensuite and another has bunk beds, or half the table drank and half didn't.
Some splits don't need one. A restaurant bill already lists what everyone had, so splitting a bill automatically by item from scanning a photo on Tabster beats typing it into a form. And a whole trip's worth of costs isn't one sum to divide — that warrants a trip on Tabster that collects scanned receipts and other expenses as they happen, so you can easily divvy up at the end of the trip.