Regarding Android: I switched to Android for the "NoRoot Firewall" and since most Android phones are Root-able I can also edit my hosts file.
The article gives a very good analysis of what I have been telling friends, and my constant complain towards that Cancer called Facebook: why does my e-banking app or Booking.com or practically every air carrier's app, need to alert FB that I am using this or that app?
Anyone with an Android can install that NoRoot Firewall and see in 60seconds what their phones are doing when you are not looking. This in combination with the applications running in the background 24/7 makes privacy a thing of the past.