How Can I Effectively Use a Working Hour Calculator to Manage My Team's Productivity?

I've recently started managing a small team, and I'm looking for ways to keep track of everyone's working hours efficiently. I've heard that working hour calculators can be a great tool for this.

Can anyone share their experiences or tips on how to best utilize a working hour calculator for improving team productivity? What features should I look for in a good working hour calculator? Any specific recommendations or best practices would be highly appreciated!