For an employee to badge in and badge out in attendance you need to:
1- Open a user session in the database (generally the manager user account or a general user account for all the employees)
2-Go to attendance app
3-Click on "Kiosk Mode"
4- You can then let the computer open with this page and all the employees will be able to badge in and badge out from this page:

5- By clicking on identify manually: 
    5.1 - the employee will have to choose his name/ employee profile
    5.2- the employee will then have to Click on the smart button to check in 

Optional feature:
In employee app under the HR setting tab, the HR or manager have the possibility to create a pin code.
This will force the employee to put his pin code once he choose his employee profile when clicking on identify manually.