DNS Plus is an app that allow you to change DNS setting of andriod system.
This is a DNS-based host blocker for Android. In the default configuration, several widely-respected host files are used to block ads, malware, and other weird stuff.
On the first start, you must manually update the hosts files (using the refresh button) before the service can work correctly; and you must also update the hosts files yourself regularly for now.
The app establishes a VPN service, with routes for all DNS servers diverted to it. The VPN service then intercepts the packages for the servers and forwards any DNS queries that are not blacklisted.
Custom upstream DNS can be configured. If the feature is turned off, the current connection's DNS servers are used.