No. Flutter is an alternative framework for building apps that work on Android, iOS, the web, and more. Flutter and native Android development both have a place in the current developer ecosystem, and likely will for quite sometime. To some extent, Flutter can't entirely replace native Android development as it does run, and interact with, the Android operating system at a low level. It's possible, that at some point, Flutter becomes the UI toolkit for a future operating system that effectively supersedes Android.