Antivirus - Virus Scanner and Remover for Android authenticated by the AV-TEST is the best antivirus app and junk cleaner for android FREE!

Highlights:

Real-time Protection – Authenticated by the AV-TEST, Antivirus protect your device from potential threats.
Virus Cleaner - Deep scan and detect virus, spyware, malware, trojans.
Quick Virus Scan - Only takes a few seconds to fulfill the deep virus scanning.
Junk Cleaner - Clean junk files, residual files and cache to free up storage
CPU Cooler - Optimize CPU usage and stop overheating apps to cool down CPU temperature.
App Lock - Sensitive app lock guards your privacy by setting up passwords for any apps.
Battery Saver - Automatically stop battery draining process to save battery power for longer time.
CPU Cooler - Cool down device temperate and reduce CPU usage.
Charge Manager - Auto close battery-draining apps while charging to prevent overheating & overcharging.
Call Blocker & Assistant - Customize the numbers on your blacklist and block spam calls & unwanted calls. With Call and Contact permissions, Antivirus - Virus Scanner & Remover can block all annoying spam calls and provide powerful call assistance.

Antivirus – Virus Scanner and Remover will improve your phone performance and makes it brand new. Faster and deeper scan, better and safer experience. Get this all-in-one Antivirus - Virus Scanner and Remover right now!

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Source: https://play.google.com/store/apps/details?id=com.mobile.security.antivirus.applock.wifi