RescueTime

RescueTime can only be used in an "online mode", where all your usage data is eventually transmitted to their servers for analysis and reporting. At least I didn't find any indication that the software could be configured differently. This might have some convenience benefits, especially when tracking multiple devices, although these could also be solved in a better way. Apart from the obvious privacy concerns, however, it also ties your use of the software to their service, which leads to all kinds of questions concerning mobile data usage, use while offline, future availability of the service, and a lot more. I personally wouldn't want my time tracking to be dependent on those questions and issues, and I don't think it should be for anyone. Forced online is, as in most cases, a major dealbreaker.

I recommend having a look at ManicTime, which offers pretty much all of the same functionality and benefits, while working locally and not being tied to some external server outside of your control. In fact, as a semi-obvious jab at RescueTime, "not a cloud-based service" is one of the major selling points they advertise on their website – as it should be!

I'm concerned about privacy: it doesn't seem like there's a way of hosting your own reporting sever - the usage data will go back to RescueTime. While they are emphatic that their privacy policy will protect your data I don't see a way to encrypt it such that it's only readable to those authorized (even hidden from RescueTime themselves). It's too bad because a lot of the features look like they could work in a hosted solution. If I'm going to install software that's explicitly designed to surveil me then I want to have compete control over the dates it collects and stores.

It's good if you want to know metrics and what time is wasted during days, weeks and months.

I totally recommend it if you want to save more time using your computer in the online world.

i removed because i install on windows and Linux same time and tell me the system username must be unique , Very bad design , i recommended Wakatime.

I like idea to track where do I spend my life

I installed the Firefox add-on and entered my email, but it just lists "palemoon" under "Utilities" and doesn't show individual websites.