KMyMoney
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KMyMoney runs on Linux, Mac, and Windows, providing a desktop interface for managing accounts, setting budgets, and tracking investments alongside day-to-day spending. The app supports multiple currencies and can import data from bank CSV files and OFX formats. It's lightweight, open source, and independent from any cloud service or subscription model.
This tool fits people who want deeper financial management than a simple tracker but prefer desktop software over web apps. It works especially well if you're already in the KDE ecosystem or you'd rather not use proprietary tools for sensitive financial data.