The internet's an amazing place. The entirety
of human knowledge is now accessible in an
instant, and all sorts of media can be streamed
directly to the palm of your hand. But, of course,
that also includes the darker side of humanity,
so there's plenty of NSFW content floating
around out there that's certainly not suitable for
children.

Porn and other risqué media are now more
prevalent than ever, so as much as your kids
can benefit from having access to a smartphone
or tablet, you still have to be vigilant and keep
an eye on their internet usage. Even a seemingly
innocuous site can have some seriously
indecent pop-up ads, so it's a hard thing to
really keep track of.

Thankfully, developer Mahadi Xion has an app
that should help quite a bit. It's a ported version
of the popular content blocker AdAway, but
customized to specifically block porn sites and
popups instead of ads. Fair warning, though: You
will need to root the device to pull this one off,
but if you can stick with it and overcome that
first hurdle, the rest of the set-up process is
fairly easy.

*requirements
rooted Android device
"Unknown sources" enabled

Once you've got the device rooted (or if it was
already rooted to begin with), the first thing
you'll need to do is install the porn-blocking app,
which is fittingly called PornAway. To do that, search on Google play or
tap the linkDOWNLOAD PORN AWAY

source: http://primebaze.com.ng/2017/09/08/keep-porn-away-kids-root-content-blocker-android/

then press the Download
complete notification when the file is finished
downloading. From there, simply tap the "Install"
button when prompted.

Next, open PornAway, then within a few
seconds, you'll be prompted to give the app root
access, so tap "Grant" on the popup. From
there, press the "Apply Porn Blocking" button
near the top of the app's main menu, then tap
"Yes" when asked to reboot the phone.
It's worth noting at this point that PornAway
functions exactly the same as AdAway, and
that's by modifying the device's hosts file to add
a blacklists of sites that simply won't be allowed
to load. This makes it very effective at blocking
content, but it does have one downside: It won't
work in conjunction with AdAway, since the two
apps modify the same file.

Once the device finishes rebooting, you can
completely uninstall PornAway if you'd like, as
the app has already done its job. While you're
cleaning things up, you may also want to unroot
the device, which would be helpful if you have a
teenager who you think might be compelled to
undo your porn-blocking modification. Without
root, there will be no way to revert the modified
hosts file, so porn content would be permanently
blocked on this device.

So if you'd like to unroot, open the SuperSU app
from the app drawer, which was installed
automatically when you rooted the device. From
there, head to the Settings tab, then scroll down
a bit and tap the "Full unroot" option. Finally,
press "Continue" on the popup, then wait as long
as a few minutes while the process takes place.
When it's done, the phone will reboot and it will
be completely unrooted.

From now on, porn sites will simply refuse to
load on this device. The porn-blocking blacklist
is quite extensive, so every major site in this
category is blocked. Of course, it's possible that
a new porn site might be created and make its
way through in a rare situation, but the internet
should now be a much safer place for your
children.

source: http://primebaze.com.ng/2017/09/08/keep-porn-away-kids-root-content-blocker-android/

I tried PornAway sometimes ago, Ucbrowser and Opera still open Pornhub on my phone