Use a Security App

While you’re blocking unwanted websites, add an extra layer of protection and install a security app that provides safeguards against viruses, ransomware, and other malicious content. For example, Mobile Security and Antivirus from Trend Micro protects against malicious content and blocks unwanted websites with parental controls. Other features include:

Finding malware in apps before they are installed on your Android device.Warning if your personal information could be exposed by an app.Taking a screenshot of unauthorized attempts to access your device.Helping you find your phone.Helping recover from a ransomware attack.Wiping your device.

Mobile Security is free to download, and its anti-virus and anti-malware features are free to use. The SafeSurfing and Parental Controls features require a $20 yearly subscription after a free trial period. Registration with Trend Micro is also required to use the app. To block a website using the Mobile Security app:

Use a Website Blocker

Website blocker apps let you schedule times when apps and websites are off limits. BlockSite, for example, keeps you free from distractions with these features:

Automatic blocking of adult sites.A work mode to set timed intervals and breaks.Scheduled blocking of websites and apps.Individual web page blocking.

BlockSite is free, doesn’t contain ads, and has no in-app purchases. To add a website to the blocked sites list in BlockSite:

Use a Firewall

Firewalls monitor access to your device and block data using rules. Think of a firewall as a fence between you and the internet. Make sure to choose a no-root firewall so that you don’t have to root your Android device.  NoRoot Firewall by Grey Shirts can block sites depending on whether you’re using Wi-Fi or mobile data. You’ll receive notifications when an app attempts to access the internet. NoRoot Firewall is free to download, doesn’t contain ads, and has no in-app purchases. To block a website using NoRoot Firewall: