How to permanently block sites on android and iphones?

How to permanently block sites on android and iphones?

In windows, if you open:
Windows > system32 > drivers > etc > "hosts" file

and put a line like this:
127.0.0.1 somesite.com

then this somesite.com is blocked on windows.
No browser will be able to open it.

Is there a similar hack available for android phones and apple IOS?

Basically I want to block adult type websites on phones of children.
All I am able to find is solutions where you can block them in chrome/safari browsers etc.
But children can download some other browser app and use that as easily.. to access these sites.
Thanks

 

There is no such way to block websites by making changes in host files on mobile phones without root mobile phones. You need to install security apps like Block Site or Mobile Security App or another spy app to track someone else phone. But these apps also have some limitations and charge some bucks for their services.
Here's something that may help you https://www.quora.com/How-can-I-block-websites-on-my-Android-phone

 

@Sumit_Singh
Thanks for the info

 

Thanks for the tip. I hope it works