Ensuring usability and accessibility standards in mHealth applications involves incorporating design principles and best practices that cater to diverse user needs and preferences. This includes conducting user research to understand user demographics, preferences, and challenges, designing intuitive user interfaces (UI) and user experiences (UX) that prioritize ease of use and accessibility, adhering to accessibility guidelines such as the Web Content Accessibility Guidelines (WCAG), providing options for customization and personalization, and conducting usability testing with representative user groups to identify and address usability issues effectively. Collaboration with healthcare professionals, accessibility experts, and end-users throughout the design and development process can further enhance usability and accessibility standards in mHealth applications.