Is Calculette Mauricette Reliable for Freelancers' Working Hour Management?

As a freelancer juggling multiple projects, I need a reliable tool to track my working hours accurately. I've come across Calculette Mauricette and am considering using it. For those who have used it, how well does it work for freelancers?

Are there specific features that make it stand out for managing varied work schedules and clients? Any tips or feedback on how to best utilize Calculette Mauricette for efficient time management would be greatly appreciated!