To develop an app like Sniffies, start by identifying your target audience and core features such as real-time location tracking, chat functionality, and a user-friendly interface. Choose a reliable tech stack, including React Native or Flutter for cross-platform development, and integrate GPS, live messaging, and secure authentication. Focus on user privacy and data protection through encryption and secure servers. Ensure the app complies with local regulations and app store policies. Finally, test thoroughly for performance, security, and user experience before launching on platforms like iOS and Android to maximize reach and engagement.