即売レジ is an accounting support app for doujinshi events and flea markets. With this app, you can easily calculate the total amount by tapping on the pre-registered item icons. Once you enter the amount received in the payment screen, you can immediately check the change amount.

The app offers several features to enhance your experience. It supports sales record keeping, allowing you to save sales data in a CSV file and easily transfer it to spreadsheet applications. You can also check your sales history without closing the sales screen. Additionally, it provides inventory management, allowing you to set the number of items in stock and keep track of remaining quantities and sold-out status.

即売レジ also supports landscape layout and screen splitting, making it convenient to use in different orientations. It displays the age verification date and supports multiple item sets, allowing you to register up to three different sets (switching sets during sales is not possible).

Furthermore, the app includes features such as creating item set images as a simple list, sharing item sets with other devices through a temporary storage server, and printing receipts with compatible printers. Please note that advertisements are displayed in the app, but they are not shown on the main sales screen.