Actually, I have always had the habit of keeping track of my expenses. I first picked up this habit while studying international trade, back when we used paper forms. Later, I built my own Excel-based bookkeeping system, and with the development of AI technology, I have now adapted the underlying logic of my bookkeeping to be presented via an app.

Features: Income and expense management, bank account balance management, credit card spending statistics, and tracking of money lent or borrowed. It is not currently integrated with AI, but I plan to add AI control in the future.

Currently, there is only an Android APK file; I would need to write separate software for iPhone, so I am still considering it.