DNSFilter

With our Android Roaming Client you can have your content filtering and threat protection on-the-go! Protect your surfing outside the office and on mobile networks - from anywhere in the world. Your traffic automatically goes to the nearest location just like our normal service.

Instructions for Android Deployment: https://help.dnsfilter.com/hc/en-us/articles/1500008107161-Android-Roaming-Client-deployment-guide

Android Roaming Client uses VpnService to operate a special VPN, which forwards DNS queries to DNSFilter.