ℹ️ What does this tool do?
A simple calculator for your income and expenses — an electricity bill, rent, a rental property, anything you need to track. Tap numbers on the built-in calculator, pick a category with one tap, and hit Add — no keyboard, no typing, no dialog interrupting you.
It answers the two questions that actually matter: how much do I have left? (opening balance + all your income − all your expenses) and where did this month's money go? — two different questions, and conflating them is the most common mistake in expense tools. It has two modes: personal, which analyses your spending against the well-known 50/30/20 rule, and business, which lays out an income statement with gross and net profit and their margins.
That cuts both ways: the data lives on this device and browser only, and doesn't move to another device on its own. Download a backup now and then from the bottom of the page if you want to move it or keep it safe.
The 50/30/20 rule
Spending by category
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