Splitting expenses with no sign-up

Most people searching for a split-expenses app with no sign-up are not looking for a feature. They are looking for a way to get six people into one list before the weekend starts. Every account someone has to create is a person who says “just tell me what I owe” and never opens the app. The rest of the group then trusts one person’s screenshots, which is a spreadsheet with extra steps.

What “no sign-up” actually means

Three things, and an app should do all of them:

1. No email, no password, no verification code. You open the app, type the name your friends know you by, and that is your identity in the group.
2. Joining is one step. One person creates the group and shares a link, a QR code or a short code. Everyone else opens it and picks a name. Nobody is asked to register first and join second.
3. People who never install anything still count. Someone in every group will not add an app for one trip. They should be a full member of every split, not a line in the notes.

If an app says “no sign-up” but asks for a phone number on the second screen, it fails the first point. If it lets you look but not add expenses until you register, it fails the second.

How joining works without an account

In kisir, one person taps “New group”, names it (a trip, a flat, a dinner), and gets three ways to invite: a link to drop into the group chat, a QR code to show across the table, and a six-character code to read out. Each friend opens the link or types the code, enters a display name, and is in. That is the whole process, about twenty seconds per person.

Because there is no account, there is also nothing to log in to. The group lives on the phone that joined it, and the app syncs it between members. If someone changes phones, an optional email restores their groups. That email is the only personal detail the app ever asks for, and it is a choice, not a gate.

The person who won’t install the app

There is always one. Add them by name from inside the group. From then on they are in every expense you choose to put them on, their balance appears in the overview like everyone else’s, and the settlement at the end includes them. You show them their line, they pay whoever the plan says, and you mark it received.

If they change their mind halfway through the trip and install the app, they join with the code and claim the spot that was created for them. Their history comes with it.

What you give up, and what you don’t

No account means no password recovery, because there is nothing to recover. It also means the app cannot message you by email, so notifications come from the app itself. For a one-week trip that is the right trade.

What you do not give up is trust. Every expense keeps a history of who changed what, old value to new. Only the person who added an expense can edit or delete it. Members are notified when someone adds an expense, records a payment, joins, or changes an expense they are on. Those rules do not depend on accounts; they depend on the device that added the entry.

You also keep the data. The whole ledger exports to CSV or Excel, free, at any point.

A worked example: five people, nobody registered

Nora, Sam, Aram and Lili go to a concert in another city. Dan comes too but refuses to install anything, so Nora adds him by name. The group’s currency is euros.

Each person’s share: Nora, Sam, Aram and Lili owe €30.00 + €37.50 + €10.50 = €78.00 each; Dan owes €30.00 + €37.50 = €67.50. Four times €78.00 is €312.00, plus €67.50 is €379.50, the total spent.

Balances, paid minus share: Nora +€72.00, Sam +€109.50, Aram −€36.00, Lili −€78.00, Dan −€67.50. They add to zero, as they must.

The fewest transfers that settle it: the biggest debtor pays the biggest creditor, and so on down.

Four transfers for five people, and Dan never opened an app. Nora showed him the €67.50 line, he sent it, and she marked it as received. When the last payment is recorded and every balance is zero, the group closes itself.

When an account is worth it

If your group is the same four people every month for years, an account-based app with a long shared history may suit you better, and the sign-up cost is paid once. The no-sign-up approach wins when the group is new, temporary, or includes anyone who would otherwise refuse: a trip, a dinner, a flat-share with changing people, a family holiday with parents. That is most groups, most of the time.