Write it down, and know where your money went

In Indonesian, “catat” means to note something down, and “koin” means a coin, or money. CatatKoin is a money tracker where you write down each expense yourself, from the web, Telegram, or the API. It never asks for your bank login.

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How CatatKoin started

I built CatatKoin for myself. I needed one place to write down every expense and everything I own.

Each new feature came from what my own money needed along the way. Over time, the tool grew into something other people could use too. So I opened it to the public, and anyone can now create an account and try it.

  • Late 2025. CatatKoin starts as my personal tracker for expenses and assets.
  • Mid 2026. CatatKoin opens to the public.
  • 27 September 2026. Version 1.0.0, the first numbered release.
  • 8 October 2026. Version 1.4.0 adds the asset register and reminders.
  • 17 October 2026. Version 1.5.0 adds workspaces, client payments, projects, and the cash outlook.

Read the full changelog

Who it is for

People who want to know where their money goes. Log an expense in seconds and give each part of your spending a vault. At the end of the month, see where the money went by category.

Freelancers and one-person businesses. Keep business records in their own workspace. Track what each client agreed to pay, what came in, and what is still outstanding.

CatatKoin is for one person and their own money. It does not create invoices, file taxes, or give a team access to shared books.

How CatatKoin works

You enter what happened. CatatKoin records what you tell it. It does not read your bank account, so it never needs your bank password.

Each number says what it is. A recorded balance is what you recorded. The cash outlook is an estimate from your records and the payments you expect. CatatKoin labels both that way.

Your records stay private. Your records are visible only to you. A share link is read-only, you create it yourself, and you can turn it off.

You can take your data with you. Export your expenses to a CSV file at any time.

Every release is public. The changelog lists what changed in each version.

Who builds CatatKoin

I am Maful, and I build and run CatatKoin alone. I write the code, ship each release, and answer every support email.

Your questions and ideas reach me directly. Contact me.

Try it with this month's expenses

Create a free account and log your first expense in under a minute. The Free plan has no time limit.

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