KASIČKA

Track spending. Split debts. Stay on budget.

Kasička is a small personal-finance tool for logging expenses, planning a monthly budget, and settling who-owes-who with friends — with a real Czech QR payment code. Link your Fio account and payments show up by themselves.

Amount

1 284 CZK

Continue with Google

Free to use — no credit card, ever.

Log an expense in two taps

Type an amount, pick a category, and save. Quick-amount buttons and a ± day shifter cover the rest of what usually slows this down.

Expense

Income

320

Food

Fun

Transport

Rent

Insurance

Other

See the month at a glance

Income, spending, and net for the month, plus a budget-vs-actual bar per category — no exporting anything to a spreadsheet first.

Income

48 000

Net

26 900

Food

Fun

Transport

Split it, without the group chat math

Flag part of any expense as owed by someone else. They get a real payment QR code and can mark it paid — no account, no app install.

Kačka

Movie tickets

400 CZK

Shareable link — no login needed

kasicka.eu/d/xk29fa

Let your bank do the typing

Connect a Fio account and card payments land in a Bank inbox. You only pick the category — Kasička remembers the merchant next time. Nothing is saved until you confirm it, and transfers between your own accounts never touch your budget.

Albert Praha

Card payment · today

−486 Kč

Food

Fun

Other

Save to Food

What it does

Fast entry

Quick-amount buttons and category chips — most expenses are one tap plus a number.

Monthly budgets

Budget-vs-actual by category, so you know where the month stands before it ends.

Recurring & long-term

Bills that repeat and savings goals that build up over time, tracked automatically.

Split with friends

A real Czech QR payment code per debt, and a link that works for anyone, no account needed.

Debts settle themselves

With Fio connected, a friend’s payment is matched by its variable symbol and the debt is marked paid — their page updates live.

Bank inbox

Fio payments arrive every 10–60 minutes, with optional push notifications. Pick a category, confirm, done. Cash withdrawals move to your Cash account.

Events and trips

Group the costs of a holiday or a party under one event and see what it really cost.

Other currencies

Log an expense in euros, dollars and more — it’s converted to CZK at that day’s rate, and the original amount is kept.

Czech and English

Switch the language any time, in the app and on shared debt pages.

Edit anything

Fix an amount, category or date after the fact, and attach a receipt photo to any expense.

Works like an app

Add it to your home screen and use it like a native app — no app store, no install.

Yours, privately

Signed in with Google, your data is tied to your account alone — nothing shared, nothing sold.

About

Kasička (Czech for "piggy bank") started as a way to track my own spending and the money friends and I owe each other. It's built and maintained by one person — me, Pavel — in my spare time.

Support

If Kasička is useful to you, you're welcome to help keep it running.

Buy me a coffee

Privacy & terms

Kasička is provided as-is, free of charge, with no warranty of any kind. I can’t guarantee it will always be available, error-free, or fit for any particular purpose, and I’m not liable for any loss, damage, or missed payment arising from its use — including anything to do with the amounts, budgets, or debts you track here. This isn’t legal advice; if you need something more formal, talk to a professional.

Your data is stored in a private Supabase project and tied to your own Google-signed-in account — I don’t sell it, share it, or look at it beyond what’s needed to keep the app running and fix bugs. If you connect Fio, the read-only token is stored write-only (the app can’t show it back to you) and is used only to read your movements; Kasička can never move money. A public debt-share link reveals only what you choose to share (an amount, a note, a payment QR code) — never your account.

This runs on free hosting and database tiers. If that ever needs to change, I’ll say so clearly here rather than let it be a surprise.

This is a personal project, not a company — there’s no support team, and features come and go as I have time for them. Please don’t treat it as your only financial record.

Kasička

☕ Buy me a coffee