This app is designed for company staff to tap in and out when they come to work and leave from work, it can calculate your working hours automatically, staff may only need to tap in and tap out, then the daily working hours and salary will be calculated immediately, the boss is able to manage the staff, like adding and deleting person, the boss may also check all the records of all staff, a particular staff can only check his/her own record, either boss or staff can only check the records, not modify the records.