PLATFORM
The operating system must match
Windows installers, macOS disk images, Android APKs, and Linux deb and rpm packages are handled by their respective systems. The file extension is the first check. Copying a package for another system to the current device does not convert it into a native executable.
ARCH
The processor architecture must match
x64, arm64, amd64, and aarch64 are common architecture labels. amd64 and x64 refer to the same class of 64-bit desktop architecture, while aarch64 and arm64 refer to ARM 64-bit architecture. Use About This Mac for Mac, uname -m for Linux, and Universal for Android when the architecture is unknown.
PACKAGE
Linux also requires the package system to match
deb and rpm differ in more than their extensions: they belong to different package-management systems. Using the native package format helps the installer handle dependencies, menu entries, and later removal. Do not choose a format based on file size or filename length.
CLIENT
Match the client to the configuration needs
Use v2rayN for desktop systems. Choose v2rayNG by default on Android; consider v2flyNG only when the configuration requirement or troubleshooting goal specifically points to the v2fly core. Switching clients will not fix an expired subscription, incorrect node parameters, or an inaccurate system clock.