The PlayFit application is a mobile-based application that links Core Korea's smartwatch with a smartphone and assists its functions. The PlayFit app provides a total of three categories: measurement and activity records/product settings/user settings. You can record and manage the Core Korea smartwatch user's health and activity information, or manage the device's settings and user profile. 1. Measurement records: Manage health and activity information and exercise records measured by wearable devices (smartwatches). 2. Product Settings: You can start linking your smartphone and Core Korea smartwatch, maintain the connection, and manage the smartwatch’s functions and settings. 3. User Settings: You can set user profile settings and smartwatch restoration and permissions. ◎Device support THE R, LANE2, TINI, LANE T ※Required access permission details -Location: You can use exercise route tracking and recording functions based on smartphone GPS location information. -Storage space (photos and videos, music and audio): You can use media files saved on your smartphone to set a profile image or save application user data on your smartphone. -Notifications: Allows you to receive push notifications from smartphone applications on your smartwatch. -Phone: You can link your smartphone's incoming call notification to your smartwatch or use the smartwatch's phone call function. -Calendar: Required to record user activity and exercise records and health data by date. -SMS: Required to synchronize notifications of receiving SMS messages on your smartphone with your smartwatch. ※Details of optional access rights -Address Book: You can synchronize your contacts and address book to your smartwatch. -Call records: You can synchronize your smartphone's received phone call records with your smartwatch. -Microphone: Required to use the call function of a smartwatch with phone call function. -Camera: You can use the photo attachment function and QR code image search function, or use the photo taking function of the smartwatch. ◎Not allowing optional access rights will not interfere with the use of essential functions of the application. ※ For product and application-related inquiries, please contact Core Korea Co., Ltd. through the KakaoTalk channel.