Oddly enough, iOS (even 11) has worked better for me than any Android version back when I was on Android. My Nexus 5 used to have a Google process spin out of control and kill the battery. An OS update rendered my Nexus 7 and Nexus 5 basically unusable because of performance (which I hear was eventually fixed). When the iPhone 6 came out, I said enough and went back Apple. I'm sure Android has improved since then, but so has iOS.

My point is that in the mobile landscape iOS and associated hardware, at least for me, work better than anything else out there.