Fitness apps are mobile applications designed to help users track and improve their physical health. They often include features like workout plans, exercise tracking, and nutrition guidance. Many apps allow users to set fitness goals, monitor their progress, and receive personalized recommendations based on their activity levels. These apps can cater to various fitness levels and interests, from beginners to advanced athletes. Some popular fitness apps include MyFitnessPal, Strava, and Nike Training Club. Users can also connect with friends for motivation and support, making fitness a more social experience.