Yes, Hassan isn't wrong, but just to let you know, majority of adults in USA owns a smart phone. I'm pretty sure if you can play Grepolis, you are tech-savvy enough to know how to use a smart phone, and probably have one. This brings the percentage of Grepolis players who owns a smart phone even higher.
I'm not interested in playing percentages game with you, I just want to state my point, and I'm not so lame to argue over something so trivial, so just take it as a free lesson from me.
Fun fact #1: Almost 90% of Smartphones run on Android and iOS.
Fun fact #2: 56% of adults in USA owns a smartphone. This 100% includes elderly who can't use the internet or a phone, meaning they are not grepolis player.