Ad blocking on android using dns666. There are a ton of ad blocking apps on android, but dns666 is the best I’ve found after trying a number of them out – it works by setting a vpn back to your device and (selectively) routing all traffic through that vpn This lets dns666 block requests for urls based on url filter lists. you can download a number of hosts lists inside the dns666 app, eg the list from someonewhocares. Once the lists are applied, and you have set apps to use or bypass the vpn, all ads are then blocked.