The Most Effective Antivirus Software and Apps to Install in 2021

Akesh Partel


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Although leading operating systems have amazingly advanced security firewalls, malware and virus developers don’t sleep and keep coming with more and more sophisticated codes. The aim of blackhat devs is to steal your personal data, traffic interception, phishing, and other forms of cybercrime. It’s very hard for OS providers to keep up with thousands of malicious coders. 

That’s why they need help from third parties. Fortunately, antivirus developers know how to protect your computer and smartphone. Besides, they can provide lots of extra features, such as VPN, phishing protection, password storage, and many more. Read on to discover the best antivirus app for Android, iOS, Windows, and macOS. 

1. Kaspersky Total Security

Kaspersky Total Security screenshot

Kaspersky digital security products have been providing top-notch defense for 23 years already! It’s developed by top Russian cybersecurity experts under the command of Eugeniy Kaspersky, one of the most influential programmers of all time. 

Kaspersky Total Security is a comprehensive cross-platform solution that provides spotless malware and virus detection along with the unnotable effect on your devices’ performance. Under the Total Security license, Kaspersky log in supports up to 5 macOS, Windows, iOS, and Android devices to your account. Additional features include cryptolocker protection, password storage, a secure folder for important documents, 200 MB of daily VPN, webcam control, and more. 

2. Bitdefender Total Security 2020

Bitdefender Total Security 2020 screenshot

Bitdefender Total Security 2020 is another comprehensive multi-device protection package that lets you connect up to 5 computers or mobile devices under one private license. The unique threat detecting algorithm can protect your devices from sophisticated new types of malware and warn you when you face ransomware. Similarly to Kaspersky Total Security, it offers 200 MB of VPN for automatic encryption of all incoming and outgoing data (except your browsing data). You can also connect your child’s devices to the tier to adjust advanced parental control to ensure web security. 

3. Norton 360 Deluxe

Norton 360 Deluxe screenshot

Norton 360 Deluxe is a superior solution for users who need full-time background protection in offline and online tasks. You can install the antivirus on up to 5 Macs, PCs, and smartphones. The unique feature of the product is the no-log VPN that lets you browse and exchange files online anonymously 24/7. The company also provides an encrypted 50GB cloud storage with an automatic backup feature. 

The downside of the app is the absence of such ordinary functions as file encryption and file shredder. Although the service is focused on online security, there’s no secure browser in the package. 

4. Kaspersky Free Antivirus

 Kaspersky Free Antivirus screenshot

If you want the high-class Kaspersky protection on a budget, you can get Kaspersky log in for free as well. Kaspersky free app antivirus provides a basic package of antivirus and anti-malware modules. If you need more advanced functions, this app will provide you with adjustable security alerts, password storage, and secure VPN with incoming and outgoing file encryption.  

5. Microsoft Windows Defender

Microsoft Windows Defender

This solution is already available to you if you’re using Microsoft Windows 10. Microsoft Windows Defender is a built-in antivirus module that provides full-fledged realtime protection for your system. You don’t need to subscribe or upgrade your plan to use the entire set of features. 

Windows Defender can scan your system in realtime and detect malicious files within any folder. It’s also very effective against ransomware and provides convenient parental control. Unfortunately, it’s available only for Windows 10, and you can’t connect several operating systems to your Microsoft account. However, it’s free and effective if you’re a basic Windows user. 

6. Intego Mac Internet Security X9

Intego Mac Internet Security X9 screenshot

This software is developed exclusively for macOS computers with a clear understanding of the platform’s specifics in mind. The app provides full system analysis and folder scanning for malware and viruses. The NetBarrier X9 is a high-quality Internet firewall that keeps all your browsers safe from intrusions, unauthorized access to the local network (if you have it), your payments, and private messages. 

If Intego Mac Internet Security X9 looks like a perfect option, you should understand that it’s available for one device per subscription. If you have Windows on a separate computer or your BootCamp disk, you can pay an extra $10 to activate Windows protection. 

7. Avira Mobile Security for iOS

Avira Mobile Security for iOS screenshot

Avira offers a wide range of tools for protecting your iPhone’s and iPad’s security that goes beyond malware protection. The list of modules includes an advanced network scanner that can detect leakages of your private information online, block phishing attempts, spammers, ransomware, and other forms of cyber fraud. Besides, you can use the app to block calls from spammers and unwanted sources and backup your contacts to Google Drive, Dropbox, or your email box. 

8. Avast Antivirus for Android

avast app screenshot

Avast used to be one of the major antivirus software developers for PC, and now it’s a leader on the smartphone market. Avast Mobile Security and Antivirus for Android includes a powerful web firewall, malware protection, anti-theft module, unlimited VPN, and virus eraser. In addition, you can use the app to clean system junk, boost your phone’s RAM, test WiFi speed, and more. 

Safe & Sound

Using one of these apps on your smartphone and computer, you can ensure that your devices are safe and ready to deal with unexpected attacks. But which solution is best for you? In most cases, you can get by with a basic package. If you’re looking for a comprehensive business antivirus, I recommend you to get a trial of a premium version of one of the apps above to find the option that meets your business requirements the best. Which one will you try first? Tell about your choice in the comments and share this list with others.