Clash Royale  is a great gam  for mobile. I used to play it when I was a kid.
Do you know of other similar games that would be interesting?
No, I am not really a mobile gamer. I do all of my gaming on PC.
I see. What kind of games are better to play on a PC?
I play CSGO, a great FPS available on steam for free.
I have played some games on Steam, but since I always have my phone with me, it's easier to play games on there. Do you have any experience with Clash of Clans?
I agree. When you play on mobile, you can literally play games anytime anywhere. Its kind of ultimately a great way to game. 
Do you know when mobile games started being made?
I think in the early 2010s when the iPhone became popular
That would make sense. Do you know the most popular iPhone game?