This document discusses hybrid mobile applications and using JavascriptCore. It explores using a native bridge to connect webviews to native device APIs for push notifications, social media integration, and other features. It recommends using a lightweight framework like JQMobile and focusing on CSS transforms instead of properties like box-shadows that webviews don't support well. The document also discusses an alternative approach of embedding web content natively by rendering templates and handling networking in the native layer for better performance. Overall it analyzes the tradeoffs of hybrid apps and recommends the best of both native and web approaches.