Smart phones and tablets are faster, cheaper, and more powerful than ever. Sencha Touch enables developers to build truly cross-platform mobile apps or to extend existing enterprise applications to mobile clients. With numerous features that mimic the native capabilities of mobile platforms and an MVC architecture that feels right at home for developers, Sencha Touch is the most efficient way available to build sophisticated, high-performance rich mobile web applications. Sencha Touch in Action is the definitive guide to developing applications with Sencha Touch. It starts with basic design principles for building great mobile applications and then explores the features of Sencha Touch that bring those ideas to life. It uses real-world examples to show how and why objects operate in the framework. The book also promotes the emerging best practices for mobile web development, from widget implementation to developing an application with the Sencha Touch MVC framework.