Android app
NetSecWall for Android (beta): the on-device DNS firewall, blocklists and settings.
NetSecWall for Android: what it does and how it works (beta)
A free beta DNS firewall for Android 7.0 and newer. It blocks ad, tracker and malware domains on the phone itself, with no root and no account. It isn't on Google Play yet.
Blocklists, overrides and DNS settings on Android
Turn lists on in the Blocklist tab and tap Update enabled to download them. Add overrides to always allow or block a domain, and set the resolver, DNS-over-HTTPS and block response in Settings.