Cattr is described as 'Free open-source self-hosted time tracker with desktop clients for windows, mac, linux. The key features are built-in screenshot capture, activity detection' and is a Time Tracking tool in the office & productivity category. There are more than 100 alternatives to Cattr for a variety of platforms, including Web-based, Mac, Windows, iPhone and Android apps. The best Cattr alternative is Super Productivity, which is both free and Open Source. Other great apps like Cattr are Toggl Track, Karman, ManicTime and solidtime.