5 best firewalls for Android for free (2021)

Connecting to the internet from our cell phone is so common that we tend not to worry about all the consequences that this connection can involve.

Fortunately, there are tools for Android that help you check the relationship between the applications you have installed on your phone and the Internet.

We will dedicate this article to firewalls or firewalls, those apps that you can install on your phone to block them all Internet connections that could be harmful for your terminal.

Next, let's see what is a firewall, what does it do in Android and the best firewalls you can use today.

What is a firewall and what does it do in Android?

These are the best firewalls to protect your Android mobile.

A firewall or firewall for Android is an application that acts as an intermediary between the rest of the installed applications and the Internet connection. In theoretical terms, it is a tool that allows or blocks the exchange of communication packets between both parties.

On certain occasions, an application can connect to the Internet for malicious purposes, and this is where the firewall appears to be denying that communication between the two and, in this way, protect the safety of your mobile.

Another interesting feature of the firewall or firewall for Android is that of limit the Internet connection of those applications that consume the most. If you think an app is consuming too much data from your mobile rate, you can control packet exchange with a firewall to save mobile data that you will need at another time.

In short, a firewall or firewall is in charge of check the relationship between your mobile phone and the Internet, allowing or denying the exchange of communications to protect the terminal. We will know the best firewalls that you can download now on your Android.

The best firewalls for Android

• NetGuard
• Firewall without root
• Firewall
• InternetGuard
• karma-firewall

NetGuard

One of the best security applications for Android is NetGuard, a free firewall that doesn't require your Android mobile to be rooted to work. With this app you can block any application from accessing the Internet, as well as from any address, both via mobile data and via WiFi network.

Plus, you can get notifications when an app tries to connect to the internet and access a log of all connections when you need them. In this way, NetGuard will help you save tariff data, improve security and privacy and also save battery life.

Firewall without root

Firewall without root allows you to block the internet connection of apps.

The best known firewall for Android is Firewall without root, which you can download for free and which, as the name suggests, it does not need root.

More than 5 million downloads accumulate in the Play Store of this application, with which you can allow or block any connection on your mobile phone to the Internet, as well as being notified whenever this happens.

With minimum permissions to work and a simple interface, Firewall without root is a very useful firewall for your mobile phone if you want to protect it from any danger when it connects to a network.

Firewall

The Protectstar company is responsible for Firewall, a free app for your mobile phone with which you can block any unwanted or dangerous access to the Internet. Using this tool, it is you a choose which apps can or can't connect to the network.

Thanks to the Firewall functions, you will be able to see which apps consume the most data, create customized settings for firewall operation and block background apps, among other details. As a noteworthy fact, this application doesn't need root to run.

InternetGuard

Another firewall for Android that does not need root is InternetGuard, which you can download for free from a Play Store where it already has over a million downloads.

With this app you can allow or block the Internet connection of any installed application or web domain, disable background operation of an app, see all information on data usage and receive a notification every time an item wants to connect to the network, including multiple functions.

In summary, InternetGuard is a very complete app with which you can protect your mobile and save both battery and mobile data.

karma-firewall

Karma Firewall is one of the best firewalls for Android.

The last firewall for Android that we want to recommend is called Karma Firewall and, like the ones mentioned above, it is free to download and does not require root.

Like all good firewalls, Karma Firewall allows you to control internet access for each of the apps you have installed on the terminal. No advanced knowledge is required to use it, just select the app and block or authorize its connection to the network.