I work in the ad tech space, spent a lot of time on the publishing side. We've always had higher CPMs from Android users than iOS users. There's just more hooks

I work in the ad tech space, spent a lot of time on the publishing side. We've always had higher CPMs from Android users than iOS users. There's just more hooks in Android for tracking than their is for iOS, and it'll probably continue to be that way. If you're not a fan of tracking switching to the Apple ecosystem is a good in between. A more extreme route would be to have a rooted Android phone without Google Play Services but the hassle isn't really worth it for me.