Is Adobe AIR free to download?

Yes. Adobe AIR is distributed as freeware for Windows, macOS, and Linux end-users. Developers who build AIR applications use the separately distributed this application SDK and SDK Manager, which are also available free of charge.

Which operating systems does Adobe AIR support?

Adobe AIR supports Windows 7 and later (64-bit), macOS 10.10 and above, Linux x86_64 and ARM64 distributions, Android 4.0 and above, and iOS 9 and above for packaged mobile applications.