….you need to clarify what type of activity and/or if it is for a computer, cell phone or tablet. Your question is too vague. Are you willing to pay something for the tool ?
Those are two different questions or areas to discuss.
If it’s control then you install management. Since that would be classic business management the issue might be a new business owner that wants the computers to whip the employees rather than mid management.
A time tracker application empowers your employees to automatically track time with a timer or log the time they spent on various tasks manually. Time tracking can also be a part of a more extensive project management solution where you can monitor time spent by assignments completed.