Fitness apps can support health behavior changes by providing personalized guidance, tracking progress, and fostering accountability. Many apps offer features like workout plans, nutritional advice, and progress logs that help users set goals and monitor achievements. The interactive nature of fitness apps can motivate users through reminders, challenges, and community forums. Additionally, gamifying fitness activities enhances engagement, making it easier for individuals to adopt healthier habits and stay committed to their fitness journeys. Overall, fitness apps can be valuable tools for promoting lifestyle changes.