Flutter – The Future of Mobile App Developer Flutter is a very popular Googles SDK used popularly for Mobile App Development. The Mobile App Developers feels easy to use Flutter because of its features like cross-platform Application, customized plenty of Easy-to-use Widgets and is a single codebase for any platform. Introduction: Flutter is a Cross-Platform App Development Framework enables the programmer to build an application that can run on Android as well as iOS. It uses a common codebase to design an application as it has an engine designed in the most popular language, C++, commonly used by everyone and easy to understand. Flutter is a Google product and the alpha version of Flutter was released at Google I/O/2017 and since then it has been improved drastically by all of its leaps and bounds. Google developed to assist ambient computing and becomes so popular because of its powerful and easy-to-use features. It is used by many Companies like Grab, Groupon, eBay, ...