* explanation This is a dedicated app that allows U+Works services to be used on mobile devices. The available functions include email, message, electronic payment, bulletin board, task management, schedule management, address book, and resource reservation. This mobile app can only be used by subscribing to U+Works. If you want to use the service, you can sign up at U+ Biz Market (https://bizmarket.uplus.co.kr). For other subscription inquiries, please contact U+Works Customer Center (1544-70