Best practices for developing secure mobile applications include implementing strong encryption, thorough testing, and regular updates. Using secure coding practices helps mitigate vulnerabilities during the development phase. Additionally, conducting penetration testing can identify potential threats. It's essential to keep user data protected and comply with privacy regulations. Users should be informed about data usage and permissions, fostering transparency. Finally, adopting a framework for incident response ensures preparedness in case of security breaches, keeping both the application and its users safe from harm.