Interface design for mobile apps, websites, AI voice assistants, AR goggles, and brain-embedded chips varies by platform. Mobile apps prioritize compact, fast, intuitive designs; websites focus on cross-device compatibility and structure; AI assistants emphasize natural dialogue; AR requires 3D modeling; and brain chips demand deep neurological understanding. All aim for user-friendly interaction, requiring designers to master platform-specific skills and actively test hardware to ensure intuitive, effective designs.