The document outlines the steps to build a personal expense tracking mobile app using Flutter. It describes 17 main steps including setting up the initial project, adding transaction cards using containers and columns, implementing user input with text fields and buttons, adding scrollable lists to display transactions, integrating a modal sheet and date picker, and finishing with theming, fonts, images, and charts. Additional steps refined the input logic and container alignments. The final app allows users to track expenses over time on both iOS and Android platforms.