The trip is unforgettable. The bill maths shouldn’t be
Syncrofin is the group expense tracker built for the messy reality of shared money — the villa, the flat, the leaving do. Split any bill five ways, bring in friends who’ve never opened the app, and watch every debt resolve to a single, honest line. Free, unlimited, and fluent in 127 currencies.
Five ways to split, because life doesn’t divide evenly
Some nights everyone pays their share and no more. Others, one person had the lobster and another just the salad. Syncrofin bends to the bill instead of forcing the bill to bend to it — split evenly, by exact amounts, by percentage, by weighted shares, or line by line down the receipt.
And it reconciles to the last minor unit. A hundred split three ways lands as 33.34, 33.33 and 33.33 — never a phantom cent adrift, never a rounding error someone has to eat. The total you entered is the total that comes back out.
- Equal, Exact, %, Shares or By Item — pick per expense
- Every split sums back to the exact total, guaranteed
- Itemise a receipt and let each line find its people

Add the friend who’ll never download another app
There’s always one. The cousin, the colleague, the friend who swears they’ll settle later. Add them by name and they become a full member of the group in every way that counts — they can pay, carry a share, hold a balance, and be settled with. Nothing about the maths waits for them to join.
When they finally do come aboard through an invite, their entire history walks in with them. No re-entry, no reconciliation, no awkward “what did I owe again?”
- Guests act as full members — payer, debtor, all of it
- Up to 50 people per group, 49 of them guests if you like
- A guest’s history transfers intact when they join

Who owes whom, in one clean line
Behind the scenes sits a debtor-to-creditor ledger that never blurs the picture. Balances are kept strictly per currency — each one answers only to itself — so a weekend spent across two countries never collapses into one misleading number.
The result is the sentence everyone actually wants: who owes whom, and how much. No spreadsheet, no group-chat argument, no mental arithmetic at midnight.
- Per-currency balances — nothing is ever cross-netted
- Each pair nets to a single direction and figure
- A member with an open debt can’t quietly slip out

Settle the whole group in as few transfers as possible
Six people, a dozen expenses, and somehow it comes down to two or three payments. Syncrofin untangles the web and proposes the shortest route to zero — fewer transfers, less faff, everyone square.
Part-payments are recorded as exactly that. A contribution toward a debt reads as a contribution, never a premature “all settled,” so the books always tell the truth about where things stand.
- A shorter settle-up path than paying everyone individually
- Partial payments logged honestly, not rounded up to done
- Undo a settlement if someone jumped the gun

A shared wallet that speaks 127 currencies
Split a dinner in euros and a villa in another currency inside the same circle of friends, and each stays exactly what it was. There’s no invisible conversion quietly reshaping what anyone owes at a rate nobody agreed to.
For groups scattered across borders — the remote team, the destination wedding, the friends who met abroad and never stopped travelling — it’s the rare bill-splitter that doesn’t flatten the world into one currency.
- Each group settles in the currency it was created in
- 127 currencies available, each kept precise
- Ideal for trips, expats and cross-border friend groups

Share a link, and the group fills itself
A single link is all it takes. Send it to the group chat and anyone who taps it lands straight inside, seeing every expense and exactly where they stand. The link is the invitation and the key in one — no approvals to chase, no accounts to pre-arrange.
It stays live for a week and can be switched off the moment you’ve got everyone, so the door only stays open as long as you want it to.
- Invite links open the full group in one tap
- Live for seven days, revocable whenever you’re done
- No approval queue — the link itself lets people in



