Killer apps against virus

You should have an antivirus app installed on your phone as well. However, we strongly advise that you don't install any unknown apps in this category. A top paid Android antivirus app called Virus Shield was uncovered as fake last year. NDTV looked at tests conducted by independent antivirus testing website AV-Test as a starting point and compared their results with our experiences to find the best Android antivirus apps.

CM Security
It has features such as virus scanning, removal, app lock (passcodes for apps) and even takes a selfie if someone enters the wrong password when trying to use those apps. When you enter the correct code, you'll be able to see if anyone tried to access your app, along with their picture.

Avast
One of our favourite picks for desktop antivirus software, Avast is also a solid pick on Android. It has a nice user interface and offers basic features such as virus scanning and removal. It also lets you password-lock two apps for free - so you can lend your phone to a friend to make a call, without them being able to see your gallery, for example.

AVG
NDTV says this is our preferred app because it doesn't hurt the device's performance or battery life. AVG offers basic virus scanning and removal for free but advanced anti-theft features such as taking a picture of the person who enters incorrect passwords thrice are available in the premium version.

Kaspersky Internet Security
Kaspersky automatically scans newly installed apps, even the ones you install from the Play Store. It also includes anti-theft features such as remotely erasing all your phone data, and taking a selfie when people enter the wrong password. If you want advanced features such as cloud-based scanning, you will have to pay for the premium version.