I really like Tyme for time tracking. It works quite well for me, is dirt cheap, has a great UX across both my iphone and my macbook and gives me flexibility around start and end times so it's easy to keep it roughly accurate.
That said, I don't use it for detailed task observation. For example while writing this my "management" timer is running and this is definitely not managing my team. I use it for directionality more than anything else.
I'm using gtimelog for this. Similarly, I don't need a minute-precise account of my time, but it helps to get a rough overview where my time is going - system maintenance, incidents, project work, organization - or what time certain infamous internal projects really consume using the tags.
That said, I don't use it for detailed task observation. For example while writing this my "management" timer is running and this is definitely not managing my team. I use it for directionality more than anything else.