You might like to read the other thread I made showing an alternative setup within SambaPOS for this. For me I am using the alternative setup it feels smoother.
TimeTrex is very powerful complete Enterprise ready payroll software. But you can also just use it for partial use like just the Time Clock.
I prefer it even if its just used as a Time Clock because of the API and how it works. Might be more difficult to setup this way vs just a simple TimeClock app but I love the API and how it is designed to work.
I would prefer to keep most discussions about SambaPOS however. These tutorials were mostly to show how it is possible not to discuss the Third Party software.