Db3fin is a personal finance application that uses artificial intelligence to help users manage their expenses through a conversational interface. The app allows users to record spending by typing or speaking naturally, and it automatically categorizes transactions using AI. It then generates clear reports to provide an overview of financial activity. The service is offered as a subscription, with a 7 day free trial followed by a monthly fee of R$9.90. The primary function of Db3fin is to simplify expense tracking and financial organization. Instead of manually entering data into spreadsheets or using complex budgeting software, users can interact with the app as if speaking to a personal assistant. The AI handles the classification of each expense, reducing the need for users to assign categories themselves. The resulting reports are designed to be straightforward, showing spending patterns and totals over time. Typical use cases include daily expense logging, monthly budget reviews, and gaining a clearer picture of where money is being spent. The workflow involves opening the app, describing a purchase or payment in natural language, and letting the AI process and store the information. Users can then access summaries and reports to analyze their financial habits. The app is web based, accessible through the URL db3fin.online, and requires an internet connection to function. No specific hardware or operating system requirements are mentioned beyond a modern web browser.