what is flipper fr?

Flipper is a debugging tool built by Meta (Facebook) that helps developers inspect and troubleshoot mobile apps while they are running. It connects your desktop to an iOS or Android app, then shows you what is happening inside: network requests going in and out, the visual layout of screens, log messages, and more. Think of it as a window into a running app's internals, displayed in a clean interface you can interact with. Originally it ran as a standalone desktop application. The project has recently shifted to running inside a regular web browser instead, though the functionality and interface remain the same. A small server process runs locally, and you open Flipper in your browser to use it. A macOS wrapper app is also provided for those who prefer something more app-like on their machine. Flipper is built as a platform rather than just a fixed set of tools. Developers can write their own plugins if the built-in tools do not cover what they need. The plugin system handles the communication between the desktop and the mobile device, so plugin authors focus on what to show rather than how to move data. The repository contains everything: the browser-based desktop interface, native SDKs for iOS and Android, a JavaScript SDK, a cross-platform C++ SDK, and a collection of pre-built plugins. React Native support was dropped after version 0.239.0 due to technical constraints, and Meta is building separate dedicated tooling for React Native going forward. The project is open source under the MIT license and is available on npm via the flipper-server package.