Tips for splitting travel expenses
Agree on the rules before you leave. Will you split everything equally, or only split what each person took part in? Equal splitting is simpler; itemized splitting is fairer when budgets differ. Either works as long as everyone knows which one you're using.
Log expenses the same day. Memory fades fast on holiday, and receipts get lost. Adding a bill while you're still at the table takes ten seconds and saves a long reconstruction session on the flight home.
Record expenses in the currency you paid in. Converting by hand introduces rounding errors and arguments about which rate to use. Let the app apply live exchange rates consistently.
Settle once, at the end. Paying each other back after every meal creates dozens of tiny transfers. With a running balance, each person makes one payment when the trip is over.