Qt is not only a cross-platform software development kit for PC platforms, it also supports mobile platforms such as iOS and Android. The developers of Qt introduced Qt Quick back in 2010, which provides an easy way to build custom user interfaces that are highly dynamic, where users can easily create fluid transitions and effects with only minimal coding. Qt Quick uses a declarative scripting language called QML, which is similar to the JavaScript language used in web development. Advanced users can also create custom functions in C++ and port them over to Qt Quick to enhance its functionality. At the moment, Qt Quick supports multiple platforms such as Windows, Linux, Mac, iOS, and Android.