This application uses LINE Login for secure user authentication. Upon signing in with the provided test LINE account, the reviewer will have full access to all features. The app enables employees to record attendance by performing Clock In and Clock Out actions, during which the device’s location is collected solely at the moment of the check-in/out event for verification purposes. No background location tracking is used. Additional features include viewing weekly working-hour summaries, accessing assigned work shifts through the calendar, submitting leave requests, and reviewing personal profile information. The application contains no in-app purchases, no external user-generated content, and requires no additional configuration. All functions are accessible immediately after login for testing.