Warikan is a free bill splitter for group trips. Everyone adds their own expenses from their own phone — in any currency — and it works out who owes whom in the fewest possible payments. No app to install. No sign-up. Nothing to pay.
Don't settle each bill at the table — it's slow and it's where the arguments start. Track who paid for what as you go, then net everyone off at the end. Total what each person paid, subtract what they actually owed, and the difference is their balance. Warikan does that arithmetic and reduces it to the fewest possible transfers.
Warikan (割り勘) is the Japanese term for splitting a bill evenly across a group — going Dutch.
No. They open the link and they're in. It works in any phone browser. If they want, they can add it to their home screen and it behaves like a native app.
Add or remove people any time in Settings. Existing expenses are recalculated without them.
Your trip is stored behind a random, unguessable link. There's no account and no email. Anyone with the link can view and edit the trip, so keep it to the group chat.
How to split costs on a group trip (without it getting weird) — what to track, handling uneven splits and multiple currencies, and settling up in the fewest payments.