Split trip expenses — even where there's no signal
Trips are where expense apps fail: no roaming on the mountain, half the group never installed anything, and three currencies in one weekend. Deudin was built for exactly that trip.
“No signal at the refuge.”
The expense waited — then everyone forgot it.
“I'll pay, we'll sort it out.”
Four people said that. Nobody sorted it out.
“Was the ferry in euros or kuna?”
The summary stopped making sense by day three.
Why trips break expense apps
Most expense apps assume a connection and a group of people who all installed the same app. A real trip has neither: expenses happen on boats, mountains and metros, and there's always someone — the uncle, the friend-of-a-friend — who will never download anything. So the record gets kept "later", which means badly.
How Deudin handles the trip
- Offline-first, for real. Add the expense at the refuge; it syncs when the signal returns. Reading works offline too — check balances on the plane.
- Friends by name. Add "Tomás" and "Abu" in seconds. They participate in every split and balance without installing anything; anyone can claim their spot later with an invite link.
- Currencies stay separate. The Lisbon dinner in €, the Miami taxi in $. Balances are tracked per currency — no invented exchange rate mangling the totals.
- Several payers, one expense. "We both put in for the hotel deposit" is one entry, recorded the way it happened.
- Settle up at the end. Deudin suggests the fewest transfers per currency — 12 crossed debts become 3 payments.
The end-of-trip settle-up
When the trip ends, nobody wants homework. Open Settle up: Deudin nets everyone's balances per currency and proposes the minimum set of payments. Record each payment as it happens — partial payments count too — until everyone's square. Every entry stays in the history with who changed what, so the "wait, that dinner was 60 not 80" conversation ends by reading, not arguing. If you want the details of how the math works, we explain debt simplification here.
Questions, answered
Does it really work with no internet?+
Yes — reading and writing. Deudin keeps a local copy of the group on your device; changes queue and sync automatically when you're back online.
Do my travel companions need the app?+
No. Add them by name and the ledger works. If someone wants to see or add expenses themselves, they claim their spot with a link — from a browser, no store install.
What about mixed currencies?+
Each currency is tracked separately and settled separately. €64 dinner + $23 taxi never becomes one misleading number.
Can two people pay for one thing?+
Yes — multi-payer expenses are first-class. Record who put in how much; the split among participants is independent.
The next trip pays for itself in saved arguments.
Create the group before you leave — adding your friends takes ten seconds, with or without them.