Honestly, I don't understand how anyone plays this game on a phone, unless it's one if those larger ones. Even then, I would think it would be pretty frustrating.
Quite simple, don't have any choice... First started playing on windows, but that's hopeless. To be honest, my eyesight is good enough that I see everything perfectly. The only thing that bothers me is typing. Would rather play on a tablet, but I wouldn't buy a cheaper one just for this game. I rather wait until I can afford a really good one, more likely iPad, cause iOs is always comes first, no matter the game. And those are not cheap, especially in my country.
I play on these two gadgets