You can use a hosts file that redirects all the domains that serve garbage to 127.0.0.1. If you have rooted your phone, at least. There are plenty of good lists

You can use a hosts file that redirects all the domains that serve garbage to 127.0.0.1. If you have rooted your phone, at least. There are plenty of good lists available in forums. Like this, you remove ads system-wide, even in apps.