I use Lockdown for iOS, and Blokada or TrackerControl on Android (they're all very similar, on-device vpn + block list). Even with tracking disabled, apps will

I use Lockdown for iOS, and Blokada or TrackerControl on Android (they're all very similar, on-device vpn + block list). Even with tracking disabled, apps will still contact third party ad/tracking servers. Just this morning on iOS: - app-measurement.com - play.googleapis.com - googleads.g.doubleclick.net - mobile-collector.newrelic.com - inapps.appsflyer.com - api.mixpanel.com - graph.facebook.com (this is a major offender, even if you don't have Facebook apps installed, other apps love to feed FB data)