Avast mobile security is an android app and scans as well as secures the phone against files that are infected, malwares, unwanted privacy breaching, spyware and other harmful viruses called Trojans. The antivirus engine automatically scans the malware and viruses to check for Trojans, infected apps and also if any new app installed poses any security threat. The app permissions feature enables you to peek into the insights of the apps installed and also helps you to take a grasp of the access rights, permissions and ad network integrations of the apps installed. There is also a feature called call blocker.