Titans is a hybrid app development framework that allows using JavaScript to build Android and iOS apps. It uses a webview to display web content but also provides APIs to access native device features. Developers can call native APIs through JavaScript or access webview content from native code. This allows building hybrid apps that are high performing and feel truly native. Titans has been shown to improve app performance and reduce loading times compared to traditional hybrid approaches. It currently supports over 50 common APIs and has been used to build many large scale commercial apps.