cotoru コトル is a lifestyle application developed by VAJ Digital Design K.K. for iPhone users. This free app simplifies the process of participating in prepaid card campaigns by scanning barcodes. By just scanning the barcode with your phone's camera, cotoru automatically populates the required barcode numbers on the campaign webpage, making the entry process hassle-free.

Upon the initial launch, users are prompted to grant camera permission for barcode scanning. Additionally, users can register their email address within the app, which will be reflected on the campaign webpage for seamless participation.

To use cotoru コトル, users need to launch the app, scan the barcode of their prepaid card, select the campaign they want to participate in, answer any necessary questions, and complete the entry process. The app ensures that the campaign webpage accurately reflects the email address and barcode numbers for confirmation.