Kotisso

Kotisso keeps the books for any group that shares money over time: a flatshare, a trip abroad, a couple, separated parents splitting their children's costs. Everyone notes what they paid. Kotisso keeps the balances and proposes the shortest set of transfers to settle up, so nobody has to redo the maths. The sum of a group's balances is always exactly zero. - Four ways to split an expense: equally, by shares, by percentage, or by exact amounts. - 50 currencies, with the rate frozen at the moment the expense is entered, so a trip's arithmetic never moves afterwards. - A photo of the receipt attached to the expense, as proof. - CSV and PDF export, free. - 16 languages, right-to-left included. - Installs as an app and opens without a network. No bank connection, ever, and no money moves through Kotisso: it counts, it does not pay. The whole accounting side is free and stays free. The paid plan (2.99 EUR per month, or 24.99 EUR per year) adds ten active groups instead of two, the full history instead of the last twelve months, per-group statistics and an avatar photo. A free account sees fewer lines, never different figures.