フリマ収支管理メモ is a productivity application designed specifically for managing income and expenses related to flea markets and auctions. This app allows users to meticulously register data for items being sold, including important dates such as purchase, listing, shipping, and transaction completion dates. Users can also input financial details like selling price, purchase cost, packaging materials, and fees. An additional feature is the ability to self-evaluate transactions using a star rating system.

The app provides automatic calculations for profit margins and cost ratios, and it offers three types of display modes: list, grid1, and grid2. Users can aggregate data on a monthly, yearly, or all-time basis, and it includes various other convenient features. A premium plan is available, which removes ads and unlocks additional functionalities. Overall, this app is a comprehensive tool for anyone involved in selling products at flea markets or auctions.