Android definitely doesn't use Linux as a runtime, but the implimentation of the kernel and userspace is quite Linux-like in my opinion. OSX isn't a BSD distro

Android definitely doesn't use Linux as a runtime, but the implimentation of the kernel and userspace is quite Linux-like in my opinion. OSX isn't a BSD distro because it uses a non-BSD kernel with a BSD compatibility layer; Android on the other hand is Linux, but not GNU/Linux. Saying Android isn't Linux depends on your definition of Linux being incorrect.