Blokada doesn't require root. Been using it for a while and it's fantastic.

…so it uses the VPN API, just like the apps that have been banned from the App Store/Play Store/Appstore. Adaway requires root because it modifies /etc/hosts.

>"…so it uses the VPN API, just like the apps that have been banned from the App Store/Play Store/Appstore."

Yes precisely. And that's not a problem because F-Droid doesn't ban these sort of things.