오이사공(5240) is a comprehensive HR management system offering services in personnel management, organization, workforce planning, attendance, payroll, evaluation, welfare benefits, education, recruitment, job duties, and workflows. With over 20 years of experience in developing and operating HR systems (eHR), the app aims to alleviate the challenges faced by HR teams, reducing overtime and holiday work.

The mobile app allows users to quickly check personnel status, employees' attendance, approvals, and make various requests. Features include summary inquiries for annual leave, compensatory leave, overtime (weekly, monthly), and providing functions to check in/out/leave.

In addition, users can access personnel status, attendance records, work schedules, and if using the payroll module, receive detailed pay statements. The app also facilitates easy submission of various requests such as general leave, condolence leave, business trips, overtime work, types of work, early leave/exit, and changes in attendance through mobile devices.