Hybrid Mobile Application - Hybrid apps combine elements of native and web apps, allowing them to be installed locally but also work across platforms. - Popular hybrid frameworks discussed include React Native, Ionic, Framework7, and PhoneGap. - Ionic is one of the most popular frameworks; it uses HTML5, CSS, JavaScript and Angular to create mobile apps with native-style UI elements that can be built once and deployed across platforms. - To use Ionic, developers first install Node.js and the Ionic and Cordova command line interfaces, then generate an Ionic project and run it for testing using the 'ionic' commands.