Cloudflare's 1.1.1.1 Service Launches on Android and iOS (fastcompany.com)
harrymcc writes: Content-distribution network Cloudflare has introduced iOS and Android versions of 1.1.1.1, a free service which helps shield you from snoops by replacing your standard DNS with its encrypted (and speedy) alternative. The mobile incarnation of the PC service it launched last April, the apps don't require you to do anything other than downloaded and install them, give your device permission to install a VPN, and flip a switch -- making them approachable for the masses, not just geeks.
You really should read the article. If you have your own DNS or your own VPN this is a downgrade to your opsec. Most people don't, and they do use the ISP's DNS servers (or the telco carrier's DNS) ... and here is where the Cloudflare service really makes a difference.
It doesn't "Hijack" anything. You either affirmatively choose to install it... or you don't. If you don't, nothing changes.
Try reading the article for comprehension. /.reader#734