idoo is described as 'The first fitness app of its kind that measures your performance as you workout using you device's built in motion sensors. With idoo you have your own personal trainer in the palm of your hand' and is an app in the sport & health category. There are more than 25 alternatives to idoo for a variety of platforms, including iPhone, Android, Web-based, iPad and Android Tablet apps. The best idoo alternative is Kenko, which is both free and Open Source. Other great apps like idoo are SmartGym, Workout: Gym Workout Planner, JEFIT and STRAFFR.