FVM vs vfox

FVM manages Flutter SDK versions by project, allowing teams to keep builds consistent while using different versions across projects. A project’s `.fvmrc` file records its selected Flutter version and can include project-specific settings and flavors. FVM switches among installed SDKs without downloading them again. It can identify unreferenced versions, preview cleanup candidates, and remove unused SDKs with `fvm cleanup`. The documentation describes commands suitable for CI/CD automation and support for custom Flutter repositories. FVM provides packages for macOS, Linux, and Windows, with architecture availability varying by system. Installation options include a shell script, Homebrew, Chocolatey, Pub, and standalone packages. FVM detects VS Code and updates `.vscode/settings.json` for the Dart Code extension to use the project’s managed SDK. Android Studio and IntelliJ settings must be configured separately to point to the FVM SDK path. JSON API commands expose installed SDKs, releases, cleanup data, environment context, and project configuration. FVM stores known project roots in a machine-local file and says it does not scan disks for projects. The project is licensed under MIT.

vfox is a free, Apache 2.0-licensed version manager for development runtimes and SDKs on Linux, macOS and Windows. It supports project, session and global version scopes, and can switch to a project's version when entering its directory. Teams can record tool versions in `.vfox.toml` and share that configuration. A plugin system adds support for tools and environments; its public registry includes community plugins for tools such as Bun, Clang, CMake, Crystal, Dart, Deno and .NET. Plugins that support legacy version files can read formats such as `.nvmrc`, and this capability is enabled by default. Documented shells include PowerShell, Git Bash, Bash, ZSH, Fish, CMD, Clink, Cmder and Nushell. CMD is limited to global scope and is not recommended. For Docker, CI/CD and other non-interactive shells, the documentation recommends `vfox exec` instead of shell activation hooks. The configuration guide lists support for HTTP(S) proxies only. For shared SDK storage on Linux and macOS, the guide recommends group permissions and warns against world-writable access.