Develop a cross-platform mobile application utilizing NativeScript framework that seamlessly integrates with multiple external sports and health API sources, to provide users with personalized and real-time updates and news related to their interests, preferences, and fitness goals. The app should be designed with an intuitive and user-friendly interface, utilizing modern and visually appealing design elements, including but not limited to, color schemes, typography, and animations. Ensure that the user's data privacy and security are safeguarded at all times by implementing appropriate security measures and robust data encryption algorithms.
This prompt doesn't seem malicious.