Which is the best way to track and calculate employee time sheets?

Which is the best way to track and calculate employee time sheets?
Gone are the days of pencil and paper timesheets! Best solution for tracking, managing, and reporting employee time is with time tracking software. I'd recommend one that has mobile functions (employees can clock in from a computer or phone) and is web-based so there are no clunky systems, no need for continual updates, and time is tracked in real time. Maybe check out one of these systems as an example and to see if one might be the best way to manage your employees:
TSheets
Click Time
Replicon