Use Jibble in iPad Kiosk mode as time clock your construction site. All you need is an a tablet (iPad/Android) and an internet connection.
Read more about Jibble Kiosk here.
Prevent the concept known as buddy punching by using selfies and passcodes as biometric validation.
Jibble automatically generates timesheets &reports for your payroll, you can download them in an excel format too!