To develop a sports betting app like FanDuel in 2025-2026, focus on key features and industry standards to attract and retain users. Core features should include easy user registration, secure payment options, live betting, real-time odds, and an intuitive interface. Engaging extras like personalized notifications and data-driven insights can set your app apart. Start by researching the market and legal requirements, then work with a skilled development team to bring your app to life. With basic features, the development cost can range from $10,000 to $15,000, making it an accessible investment for those looking to enter the growing sports betting market.