A free app for Android, by 42Gears Mobility Systems.
SureFox is a free Android app that allows you to block web sites from your Android tablet or smartphone. The app works on the device itself and not in the cloud.
How do I use SureFox?
Install SureFox on your Android tablet or smartphone. Open the app and enter your email address. This is the email address that will be used to connect with our servers to check whether the website is blocked or not.
After that, you can click on the “Check Now” button to check whether the website is blocked or not. If the website is blocked, you will get a message that says so. If it is not, you will be able to browse freely.