Splitting expenses on a group trip
A weekend away is not one bill. It is fifteen bills, paid by four different people, over three days, in a currency at least one of you is doing mental arithmetic in. The method that works for a single dinner falls apart here, and the reason it falls apart is worth understanding.
Do not settle as you go
The instinct after every meal is to square up immediately. Resist it. Settling fifteen times means fifteen transfers, fifteen chances to mistype an amount, and fifteen interruptions to the actual holiday.
Keep a running total instead and settle once, at the end. The arithmetic is identical; the number of transfers is not.
Write it down at the time
The failure mode of a group trip is not unfairness, it is amnesia. By Sunday nobody can reconstruct who paid for Friday's taxi, and the person who did will not raise it.
Whatever you use — an app, a note, a message in the group chat — the discipline that matters is recording it within a minute of paying. Three days of receipts reconstructed on the flight home is how people end up out of pocket.
Fewer transfers, not more
With four people and a dozen expenses, the naive settlement is everybody paying everybody: up to twelve transfers. Almost all of them cancel out.
If Ann owes Bob 20 and Bob owes Cara 20, Ann can pay Cara directly and Bob does nothing. Working this through for a whole trip usually reduces a tangle of debts to two or three payments. It is the same money either way, but two transfers get made and twelve do not.
platy24 does this reduction for you and shows only the payments that are actually left.
Couples and shared wallets
Two people travelling on one card are two eaters and one wallet. Tracking them separately is correct for working out who ate what, and wrong at the end, when it produces a transfer between two people who share an account.
The fix is to keep the per-person detail and combine only the settling. In platy24 you drag one person onto another on the balances screen and they settle as one party — their individual claims stay exactly as they were, and the payment between them simply disappears.
More than one currency
A trip abroad usually produces expenses in two currencies: the one you paid in and the one you think in. Mixing them in one list is how a total ends up meaningless.
The workable approach is to pick one currency for the whole trip and convert as you enter, using roughly the rate your card gave you. Precision is not the point — the point is that every number in the list means the same thing. A 2% error spread evenly across everybody is invisible; a list where some numbers are euro and some are not is wrong in a way nobody can see.
platy24 is one currency per tab, deliberately: it will not silently mix them, and it does not pretend to know today's rate. If a trip genuinely spans two currencies you want two tabs, or one tab and a converter.
One tab or several?
One tab for the whole trip is usually right. Categories are enough to keep food, transport and accommodation legible, and one tab means one settlement at the end.
Use separate tabs when the group genuinely differs — the four who went diving are not the six on the trip — because a tab whose members are wrong produces shares that are wrong, and no amount of careful claiming fixes that.