Correct me if I'm wrong, but those content blockers only apply to safari, not apps, right? Blocking ads while browsing isn't really the issue I'm talking about

Correct me if I'm wrong, but those content blockers only apply to safari, not apps, right? Blocking ads while browsing isn't really the issue I'm talking about - web ads are already fairly restricted in what they can do, especially if you have a decent browser with extensions. With adaway on Android I'm able to block inapp ads, statistics and demographics reporting services, crash reporting services and other privacy invading services.