RescueTime

Even though it is not a time tracker in the sense of providing info to clients, I've chosen RescueTime over all other time management software. Why? Because it helps me focus, and it gives me a clear insight into how I spend my time, both online and offline. The best part: I hardly need to fill in anything, the app provides all the details of sites and apps I use on my computer and, my phone.

It takes some time, in the beginning, to set things up; you have to teach the app what you consider very productive, productive, neutral, distractive, or very distractive. But, then, it gives a clear overview of your productivity on a daily, weekly, monthly, and yearly basis. As a pro-subscriber, I can also fill in time I did not spend on my computer. ​

Besides: In RescueTime,​ I can set focus time; After spending more than one hour on distracting time during work hours, ​the app blocks all websites and apps I consider distracting.

The only thing I am missing is the possibility​ to assign work to projects and, clients. It would make it perfect!

No brainer- install it with no configuration, and you instantly get personalized and valuable weekly reports.
Works on windows/mac/linux/android/iphone so can be used by anyone in company or any external team.
Excellent user-interface, very easy to customize to each user's specific goals if they choose to do so.

The phone-based apps didn't seem to automatically categorize calls w/known contacts.
Sometimes if a given site hosted applications with two different goals/intentions/categories, this at minimum much trickier to track properly and

The most powerful feature of RescueTime is tracking on what activities you spend your time and when you do this. The power comes especially from being on every device you use.

I would like to see more features inside the mobile app. Especially regarding easily logging offline time.

This software does pick up a lot of useful data, and allows you to quickly see what things you do on the computer and how the trends flow during your day or week. There is a lot of good information, simple to install and use generally, and overall a decent experience.

I dislike the fact that you can't really customize things without lots of tedium in the categories and other areas. Also, the ability to change tracked sections of the day or week are somewhat limited; there are only one or two generic filters for declaring which days and hours to run the tracking. I have noticed that the categories are geared mostly toward organizations more than individuals. I have realized that if I customize categories to make a certain activity productive time instead of distracted time, it won't let me change just that one activity to be productive without bringing the entire category along with it.