Apple make you jump through hoops to become an iOS developer, including making you pay a monthly amount just for a licence to develop for the App Store. This could be circumvented if users were willing to jailbreak their devices, but it's a little risky just to play one game. I wouldn't recommend that unless you're a nerd.
As for an Android emulator, I know there are things like Anbox for computers, and other things that run "desktop" software, but at that point you might as well just use the desktop version of the game.