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Majority of Americans now use ad blockers
(www.theregister.com)
This is a most excellent place for technology news and articles.
Can you use a blocker on Android or is per app the best we can do?
I use an adblocking DNS plus UBO on Firefox
Its as simple as setting your Private DNS to something like
dns.adguard.com
in Network settings > AdvancedTracker Control on Android works well for system-wide tracker and ad blocking, and you can configure custom blocking rules per-app. Works without root by using a VPN profile (but no data leaves your device via the VPN, it just routes the traffic through this app).
Set your DNS servers to dns.adguard-dns.com (Settings > search for DNS). Also you should install the DDG app and enable App Tracking Protection. You don't actually have to use the browser portion of the app for it to work. After doing these two things, ads and trackers will be blocked in every app.