Blog

Why we built kisir, the trips we used it on, and what we learned along the way.

Splitting expenses on the iPhone Duo: kisir now uses both halves of the screen October 30, 2026 · On the iPhone Duo, kisir puts balances and expenses side by side. Why that helps at the end of a trip.
Sharing family expenses with your parents and siblings October 29, 2026 · How adult siblings share their parents’ costs — equal or by income — with a worked example.
Splitting wedding costs as a guest or bridesmaid October 29, 2026 · The hen weekend, the group gift and the shared rental, split fairly — a worked example in four payments.
Splitwise’s free limits, and what to use instead October 29, 2026 · What Splitwise’s free version limits, what Pro adds, and the free options if you hit the cap.
An AI glossary, translated into what kisir actually does October 26, 2026 · Smart, insights, personalized, hallucination. The vocabulary of 2026, translated into a group expense tracker with no AI.
Built with AI tools, shipped with no AI features October 26, 2026 · The code was written with an AI assistant. The app has no AI inside. How those two facts are the same decision.
Does kisir use AI? And other questions, answered briefly October 26, 2026 · Does kisir use AI? Does it scan receipts? Is it really free? Every question we get, answered in a sentence or two.
Same expenses, same answer: how kisir settles up without guessing October 26, 2026 · Integer cents, a fixed rule for leftovers, the fewest transfers. Why the same expenses always give the same plan.
The AI features kisir will never have: a roadmap October 26, 2026 · A satirical roadmap of smart features we are not building, and the plain arithmetic kisir does instead.
A chat with the AI assistant kisir will never have October 26, 2026 · A fictional chat with the assistant kisir will never ship, and the three taps that do the same job.
What a bill-splitting app needs to know about you: a name October 26, 2026 · The full list of what kisir knows about you, what it doesn't, and why an app about money between friends should stop at a name.
Why kisir does not scan receipts October 26, 2026 · Typing the total is faster than checking a scan, and most group expenses are one number. The reasoning, with a real bill.
Why kisir has no AI inside October 26, 2026 · No model, no predictions, no smart anything. Why a bill-splitting app in 2026 is better off with plain arithmetic.
Your dinner bill does not need a neural network October 26, 2026 · Six friends and a €127.50 bill, split once with AI and once with division. One of them needs a data center.
A family holiday with parents who won’t install an app October 21, 2026 · For families. Parents and grandparents added by name, couples as units, and one settlement at the end of the week.
How couples split expenses without keeping score October 21, 2026 · For couples. 50/50 or by income, a list instead of a mental tally, and when to stop counting.
If you’re the one who organises every trip October 21, 2026 · For the trip organiser. Log the booking on day one, make the list public, collect twice, and get paid without asking twice.
New in Yerevan: shared costs in drams, dollars and roubles October 21, 2026 · For people who have moved to Yerevan. Rent in dollars, dinners in drams, friends in roubles: one group currency and the real rate.
Organising a bachelor party without chasing anyone for money October 21, 2026 · For the person organising a stag, hen or birthday weekend. The deposit, the guest of honour, partial guests, and collecting without chasing.
A ski weekend with friends: how to split the chalet, fuel and lift passes October 21, 2026 · For ski and snowboard groups. Chalet by person, fuel by car, passes by whoever used them, settled on Sunday.
How to split bills with roommates without the monthly argument October 21, 2026 · For flatshares. One shared list, the payer logs it, and a settle-up on the first of the month.
Who owes whom after a trip? I built a free split-expense app with no sign-up October 21, 2026 · Why I built kisir after one trip with eight friends, what it does, and how it was built.
Splitting costs on a hiking trip, with no signal October 21, 2026 · For hiking groups and outdoor clubs. Fuel, guide, food, the hut, and four transfers for five people.
Team lunches and office gifts: splitting money with colleagues October 21, 2026 · For teams. Lunch bills, the birthday collection, the offsite, and a list nobody has to chase.
The student guide to shared money October 21, 2026 · For students. Pizza nights, the first flatshare, a weekend away for four, and settling with the fewest transfers.
Add the expense now, sync it later October 15, 2026 · Why a trip expense app has to work with no signal, and why adding it on the spot is the one habit that matters.
Building a money app in Armenian, Russian and English from day one October 15, 2026 · Why kisir shipped in three languages at once, and the grammar, plural and money-format problems that came with it.
Eight friends, five days in Cyprus, and why we built kisir October 15, 2026 · Why we built kisir, and how a Cyprus trip for eight splits €3,467 in seven payments.
Fair isn't always equal October 15, 2026 · When an even split is right, when it isn't, and a rule of thumb for not being petty.
Free, no ads, and no limits on groups October 15, 2026 · What kisir costs today, why there are no ads, and why we don't limit groups or people.
How a group ends October 15, 2026 · How kisir handles the end of a group - your own plan, one-tap settle up, and why nobody can delete it.
How kisir works out who pays whom October 15, 2026 · How expenses become balances, and balances become the fewest payments, with exact cent math.
The 15-minute money talk that saves the trip October 15, 2026 · The short chat to have before a group trip, and a checklist you can paste into your group chat.
Nobody can pay 0.99 of a dram October 15, 2026 · The bug that told a group to send 0.99 of a dram, and how kisir now settles in amounts you can actually pay.
The friend who always pays October 15, 2026 · Every group has a friend who always pays. What it costs them, and how the rest of us can take the weight off.
Shared money fights are about trust, not arithmetic October 15, 2026 · Why only the person who added an expense can edit it, and why every change is visible.
Weekend trips from Yerevan with friends, and who pays what October 15, 2026 · Sevan, Dilijan, Tsaghkadzor, Garni, Tatev, Tbilisi. For each weekend trip, what is shared and what is personal.
Which exchange rate is fair when friends split in two currencies? October 15, 2026 · Mid-market rate or what the bank charged? How kisir handles it, and why we added no bank markup.
Who pays on birthdays, farewells and group gifts October 15, 2026 · The unwritten rules of birthday dinners, farewells and group gifts, and how to keep them from turning awkward.
Why kisir has no sign-up, and what that costs October 15, 2026 · Why kisir only asks for a name, what that costs, and how to restore your groups on a new phone.
Why splitting money exactly is how friendships last October 15, 2026 · Small unpaid debts quietly sour friendships. Why a clear number is kinder than a vague feeling.