Cool Gadgets for Fitness and Cool Gadgets for Workout – These devices focus more closely on your health than smartwatches, but many still include some helpful lifestyle features such as mobile payment support and streaming music controls. They also tend to have much longer battery life than smartwatches. Fitness Trackers or Activity Tracker involves the practice of measuring and collecting data on an individual’s physical and psychological activity to keep track and maintain documentation regarding their health and wellness.