Which of the tools would you recommend to optimise the use of time?

I recommend TMetric time tracking app - a perfect solution to capture time, see where it goes, and analyze its utilization for optimization and better planning of the workload.

Yaware TimeTracker

If you work with small or complex projects and people, then you'll need a management tool with the time management feature. I'd suggest to try GanttPRO https://ganttpro.com/. This tool helps to track time spent on project tasks by team members. You can start the timer in real time or log it afterward.