This document discusses building hybrid mobile applications using Telerik Kendo UI. It defines hybrid apps as those written with web technologies but run natively on devices by leveraging the device's browser engine. Hybrid apps allow targeting multiple mobile platforms while still accessing device capabilities. Telerik Kendo UI is an HTML5 framework for building such hybrid mobile apps using its widgets. Telerik AppBuilder is a hybrid mobile app IDE, and it also has a Visual Studio extension to facilitate hybrid app development. The document concludes with a demo of a media player hybrid mobile app.