Open Hosts Editor — Open Source Productivity App

Open Hosts Editor is a free and open source application to edit the /etc/hosts file for Android devices.

Your device must be rooted. Not all devices have the hosts file in the same path, so it might not work on yours. You can submit an issue so that I can investigate.

Note: the app's repo seems to be no longer maintained, so there won't be further updates. Please report should the app no longer work.