Flutter is a software development kit (SDK) for mobile applications, created by Google. It has been created to assemble mobile applications for the major application development stages, similar to Android and iOS. Recently, Flutter is being utilized to foster another stage called Fuchsia, which Google is building. 

As an open-source system, Flutter app development services is free and it offers a total package of development apparatuses, gadgets, and structures. This empowers the application engineers to improve insight, backing off the process. Despite the fact that Flutter is a relatively new apparatus, organizations like Tencent and Alibaba have effectively accepted the innovation. Plus, Flutter is being utilized by Google in the application called 'Google Ads'.