About Kurashi OS and how to use it

Budget, plans, and weather. No sign-up needed.

Kurashi OS (formerly Kurashi Board) is a free web app that helps you see how much you can spend each day through the end of the month. It subtracts recorded expenses and planned payments from your monthly budget, then divides the remainder by the days left, including today.

A simple way to decide what to spend today, without needing perfect records. No bank accounts or cards are connected. Your budget, spending, and plans are stored in the browser you're using. Your shopping list is available from the same screen. Works on iPhone and Android.