NetWall is a free app for Android devices that will help you protect your network traffic from unauthorized access. The application requires NO root, and it works on your smartphone or tablet. You can use the application to protect your network traffic from unauthorized access, so you don't need to install a root-based firewall application.

You can choose between a host-based approach or a port-based approach. The first one is a simple and easy way to protect your network traffic. The second one is a bit more complex, but it offers more flexibility and can protect more ports.

You can also set up a whitelist of websites or apps that are allowed to access your network. If a hacker attempts to access a website that is on your whitelist, you will be notified and the connection will be blocked.

The application has a built-in firewall that protects your network traffic from unauthorized access. It is also capable of detecting a large number of malware and malicious programs.

The application has a built-in ad-blocker and content-blocking mechanism that protects you from being tracked by websites and advertisers.

The application is completely free to use. You will not need to pay a penny to protect your network traffic.