You can get the official Scratch Desktop App directly from the MIT website for free. Scratch Offline Editor - MIT
Downloading and installing the latest version of Scratch 3.0 (often called ) is a straightforward process that allows you to create projects without an internet connection. Key Features of Scratch 3.0 scratch-3-0-free-download-latest-version
Includes "glide" blocks for smoother movement and advanced operator blocks for text handling. You can get the official Scratch Desktop App
Works on Windows, macOS, ChromeOS, and Android tablets. How to Download & Install scratch-3-0-free-download-latest-version
A redesigned sound editor with new effects (like "robot" or "echo") and a vector-based costume editor with more precise tools.