即売レジ - 即売会で電卓要らずの簡単会計 is a simple cash register app that supports product accounting at events such as doujinshi sales. By tapping on pre-registered item icons, the total amount is calculated, and by entering the amount received in the sales screen, you can check the amount of change.

This app offers the following features:

• Sales record support: Sales data can be saved in a CSV file, which can be easily sent to spreadsheet applications (a separate app is required to open CSV files).
• Sales history check: You can check the sales history without closing the sales screen.
• Inventory management: By setting the number of items brought in, you can keep track of the remaining quantity and sold out status.
• Landscape layout support: The sales screen is compatible with landscape orientation.
• Age verification date display support.
• Multiple sets support: You can register up to three separate sets (switching sets during sales is not possible).
• Menu image creation feature: You can save the item set information as a simple list image.
• Item set sharing feature: By using a temporary storage server, you can easily copy data to another device.

Please note that this app displays advertisements, but they are not shown on the main sales screen.