TimeKeeper is described as 'simple time tracking application. Keep track of your day to day activities when working on your Mac' and is a Time Tracking Tool in the Office & Productivity category. There are more than 50 alternatives to TimeKeeper for a variety of platforms, including Mac, Windows, iPhone, Linux and Android. The best alternative is RescueTime. It's not free, so if you're looking for a free alternative, you could try Hourglass or Kimai. Other great apps like TimeKeeper are Project Hamster (Free, Open Source), DeskTime (Freemium), Timeular (Paid) and timeBuzzer (Paid).