How do my employees clock in and out?

Do they manually start their clock in time or do they have to clock in in some way

Employees can clock in and out from their Timecard after logging in to Empxtrack. They can use Start day to clock in and End day to clock out.

Employees receive access to Empxtrack when you add them to the system. Refer to How to send Empxtrack login credentials to a specific employee?