Sorry if this is noobish, but I don't see an option to turn autofocus off on Android or the PC version, and it really annoys me :/
Says literally everyone...
Still haven't worked it out
Go to options on PC and turn it off. There is an options button in main menu and when you press esc in-game.
On mobile it's not possible to turn it off at the moment.
On the PC version - I had to scroll down the options to find it. It wasn't readily visible.