Developing a fantasy sports app like FanDuel involves creating a dynamic platform that offers both daily fantasy sports and sports betting features. Key aspects include designing an intuitive user interface that allows for easy team management and seamless betting processes. Incorporating real-time data and updates is crucial for keeping users engaged. The app should be scalable to handle high traffic and secure to protect user information. Additionally, integrating various payment options and compliance with legal regulations is essential. A successful fantasy sports app blends robust backend technology with a user-friendly experience to captivate and retain sports enthusiasts.