Explore cross-platform mobile app development using JavaScript in this 48-minute conference talk from Mobilism 2012. Discover how modern web technologies and responsive design aim for platform-independent code while striving for a first-class experience on mobile devices. Compare web-based approaches with native counterparts, focusing on platform features and integration. Learn about frameworks that enable JavaScript to create mobile apps with native UI, push notifications, sensors, and paid distribution through live demonstrations. Examine the strengths and weaknesses of various frameworks and gain insights into debugging techniques. Dive into real-world examples like Turbot and Wonderlist, and understand the potential of generated apps. Perfect for developers interested in expanding their mobile development skills beyond traditional web applications.