ONE is a free shopping application designed for iPhone users that enhances the shopping experience by offering cashback on purchases. It features two main components: ONE Receipt and ONE Mall. With ONE Receipt, users can submit their purchase receipts to receive cash back ranging from 1 yen to several thousand yen, depending on the items purchased. This feature includes a variety of products, from everyday essentials to luxury items. Users can continuously discover new deals and rewards, making it an attractive option for savvy shoppers.

The ONE Mall component allows users to engage in online shopping across multiple stores. It functions like a shopping mall, where users can browse and shop from their favorite brands. Every purchase made through ONE Mall earns users a percentage back, adding an extra incentive to shop online. With a wide range of categories including cosmetics, fashion, and travel, ONE aims to make shopping enjoyable and profitable.