RescueTime is described as 'Automatically tracks and analyzes computer activity, offering insights to improve habits and reduce distractions, without requiring data entry' and is a very popular Time Tracking tool in the office & productivity category. There are more than 100 alternatives to RescueTime for a variety of platforms, including Windows, Mac, Web-based, iPhone and Android apps. The best RescueTime alternative is ActivityWatch, which is both free and Open Source. Other great apps like RescueTime are ManicTime, LeechBlock, TimeScribe and Orkana.