Ones official app has been released! With this app, you can receive the latest information on Ones and use convenient functions. [What you can do with the app] You can do the following using this app. 1. Check the latest information! You can check the service contents of Ones. In addition, you will receive messages from the store, so you can always check the latest information. 2. Check the information on My Page! You can check the usage status of Ones. 3. Refer a friend! You can introduce the One's app to your friends through SNS. 4. Full of other useful functions!