Automatic private time tracker for Mac OS X. It knows productivity rates for thousands of sites and apps and has a unique ability to differentiate between chats in Skype, Slack, and Telegram, YouTube videos, and subreddits. At the same time, all the tracked information is stored privately on the user's machine. There are many other features: flexible tracking settings, dynamic dock and menu bar icons, detailed feedback charts, alerts for goals, and reminders.
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Pro Wide database
There are over 5800 apps/sites/games in the database which provides lots of data for more accurate tracking.
Pro Data is stored locally
Pro Dynamic icons
The dock icon will change color depending on what you are currently doing, acting as a reminder to get back to work when you've become distracted. You can also set goals, and in the status bar you will see a percentage of how close you are to your daily goal.
Pro Differentiates between work and play
Qbserve can determine the difference between productive and distractive activities. It doesn't use a static algorithm either - it will read content page-by-page to determine whether or not it is productive or not. this allows certain chats to count as work, and other chats to not count, even if you are using the same chat service for both.
Con Short free trial
While it's good that there is a 10 day free trial, 10 days isn't very long. A longer trial would allow for better judgement of how much more productive the software made you.