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What Is Flutter? One Codebase, Its Own Rendering Engine and Where It Stands Against .NET MAUI, React Native and Native

Flutter is a UI toolkit that draws every pixel with its own engine (Impeller) instead of using the platform's native controls, and builds Android and iOS apps from one Dart codebase. We walk through its layers, show with real measurements how Dart is JIT-compiled in development and AOT-compiled for release, compare it with .NET MAUI, React Native and native development, and explain when not to choose Flutter.