Six people, two weeks, four currencies and one person who fronted the apartment. A trip is the hardest thing a splitting app has to do, and the place a spreadsheet gives up.
Send one link to the group chat. Each person taps it, types their name and starts adding — no download, no account, no email. The people who never get round to installing anything are the reason trip ledgers end up with one person doing all the entry.
Enter an expense in whatever you actually spent. The rate is fetched the day you enter it and frozen to that expense for good, so the trip total does not quietly change while you are still on it.
Add expenses with no connection; they sync exactly once on reconnect
Six people owing each other in every direction becomes the fewest payments that clear it — or the raw who-owes-whom list if you would rather see that. Both are one tap, and both show their working.