Keep the flat's expenses fair — without the spreadsheet
Utilities in one name, groceries in another, the internet bill forgotten since March. A flat is a small economy; Deudin keeps its books without anyone becoming the accountant.
“The Wi-Fi's under my name.”
And the electricity under Ana's, since 2024.
“I always buy the toilet paper.”
Small amounts, never recorded, always resented.
“Let's do the math at the end of the month.”
The end of the month never comes.
How flats actually spend
Flat expenses come in two shapes: the big monthly fixed ones (rent, utilities, internet) and the constant small ones (groceries, cleaning stuff, the shared pizza). The big ones are usually paid by whoever's name is on the contract; the small ones by whoever was at the store. Fairness isn't about splitting each purchase perfectly — it's about the running balance staying visible.
How Deudin fits the flat
- Record in ten seconds, from the supermarket line. It's a PWA on your home screen; it works even in the basement where the signal dies.
- Uneven splits when life is uneven. Rooms differ, incomes differ: split rent by percentage or exact amounts, not just equally — here's the math for splitting rent unevenly.
- Not everyone needs the app. The roommate who refuses to install things participates by name, and can claim their spot from a browser whenever.
- Settle once a month. Deudin nets everything and suggests the fewest transfers. One payment usually closes the month.
- The history ends discussions. Who changed what, when, before → after. The March internet bill is findable, with receipts of every edit.
Honest limitation: Deudin doesn't have recurring expenses yet — the monthly rent entry is a fresh entry each month (it takes seconds, but it's manual). If automated recurring charges are essential to you, Settle Up Premium has them; here's our honest comparison.
Moving in together, or someone moving out?
New flatmate: add them by name mid-month and include them only in the expenses they participate in — participation is per expense, not per group. Someone leaving: settle their balance per currency, and their history stays in the group's record.
Questions, answered
Can we split rent by room size or income?+
Yes — splits can be equal, exact amounts, percentages, or equal-with-adjustments, per expense. Rent by percentage, groceries equally.
Does everyone in the flat need an account?+
No. Add flatmates by name; they count in every balance. They can claim their spot with an invite link whenever they want in.
Does it handle recurring bills like rent?+
Not automatically yet — you re-add the rent entry each month. It takes seconds, and the amount is remembered in the history, but we won't pretend it's automated.
What if two people paid the deposit together?+
One expense, two payers, each with their exact contribution. That's a first-class feature, not a workaround.
The flat runs better when the books run themselves.
Create the flat's group now — your roommates can join later, or never.