is widow's 10 free on android device's?

hi, this is a question that isn't really related to firefox or mozilla products, so it's better asked in microsoft's support foums: http://go.microsoft.com/fwlink/p/?LinkId=528873

Windows 10 is free for qualified Windows 7 and Windows 8.1 devices

http://www.microsoft.com/en-ca/windows/windows-10-upgrade