This free version of Mobile Security and Antivirus has a good number of features to keep your device in good shape. The most important of these is the one that will analyze all of the apps that you install looking for malware. This is a process which occurs in real time and which will help you avoid most problems.
Leaving aside this essential malware protection, Mobile Security and Antivirus will allow you to establish a number of anti-theft/loss measures. You can block and locate your device remotely, and, of course, you can establish a special password so that it's impossible to uninstall Mobile Security and Antivirus without your consent.
Mobile Security and Antivirus includes many more powerful features for users who pay for the premium version, though you will find that even the free version is an excellent security tool for Android devices.