Flutter is a reactive cross-platform mobile development framework created by Google that uses the Dart language. It allows developers to build applications for Android, iOS, Windows, Mac, Linux, Google Fuchsia, and the web using a single code base. Flutter's strengths include hot reload, which enables near-instant reflection of changes, cross-platform development from one codebase, cut-down on debugging time, fast fluid UI, great app design, same app UI even on older devices, perfect for MVPs, Flutter community and support, open-source, and completely free. However, it has some drawbacks such as the need to learn a new programming language (Dart), libraries compared to native development, apps in the wild, and larger file sizes. On the other hand, React Native is a cross-platform native mobile app development framework created by Facebook based on their React JavaScript library. It allows developers to build mobile apps using React Native components, which are then compiled into native apps that are almost identical to apps written using native tools. React Native's strengths include reusable code, app stores, performance, native UI components, hot reloading, testing, reliability, and free and open-source. However, it has some drawbacks such as new technologies (JSX and ECMAScript), native UI components availability, native code limitations, almost-perfect performance compared to native apps development, and the need for platform-specific code in some instances. Ultimately, both Flutter and React Native have their strengths and weaknesses, and the choice between them depends on individual needs and preferences.