Malwarebytes Mobile Security 3.5.0.5 (nodpi) (Android 4.4+)

Malwarebytes Security: Virus Cleaner, Anti-Malware.

Block scams and protect your privacy. Our powerful app scans for viruses and malware, and aggressively detects ransomware, PUPs, and phishing scams. Malwarebytes for Android also blocks calls from scammers (the Chromebook version does not).

Your Malwarebytes for Android or Malwarebytes for Chromebook free download comes with a 30-day trial of the Premium version. When the 30-day trial is ended, Malwarebytes will only detect and clean, but not prevent, infections. It’s ad-free, forever.

Note: Malwarebytes for Chromebook is an Android app engineered specifically to protect your Chromebook. Google Play automatically detects if you viewing this page on an Android device or a Chromebook, and will install the appropriate Malwarebytes product. There are a few features, noted below, that are only available for phones.
Want to surf the web safer and faster? We recommend adding our free Chrome extension for faster page loading and protection against risky sites, such as phishing and tech support scams.

Free download on Chrome Web Store

Benefits
Premium ($1.49 per month, or $11.99 per year)

• Detects ransomware before it can lock your device
Real-time protection shields your device from infection. With mobile malware threats on the rise, advanced technologies deal with dangerous newcomers like ransomware before they can become a problem.
• Blocks calls from known and suspected scammers
Call Protection detects when a call is from a known or suspected scammer, then it blocks the call or warns you it may be fraudulent. (Currently limited to US-based calls) Only available for phones
• Safer browsing experience
Scans for phishing URLs when using the Chrome browser and alerts you when any are detected to ensure you have a safer experience while surfing the web. Only available for phones and tablets
• Detects malicious links
Alerts you to bad links in SMS text messages to protect you from identity theft and other scams. Only available for phones

Free (the Premium version also includes these benefits)
• Conducts privacy audit for all apps
Identifies the access privileges of every app on your Android device so you know exactly what information you're sharing. Keep tabs on which apps can track your location, monitor your calls, or cost you extra in hidden fees.
• Finds and removes adware and malware
Searches all files and apps quickly and effectively for malware or potentially unwanted programs such as screen lockers or adware, freeing your Android device from bloatware.