Downloadable computer software for tracking physical activity, health data, measuring walking speed, monitoring and recording walking, running and cycling distance, counting steps, calculating calories burned, creating weight loss plans and recommendations, and monitoring overall fitness progress and weight loss; Downloadable mobile applications for retrieving and displaying health information; Downloadable software in the nature of a mobile application for tracking physical activity, health data, measuring walking speed, monitoring and recording walking, running and cycling distance, counting steps, calculating calories burned, creating weight loss plans and recommendations, and monitoring overall fitness progress and weight loss