Security is a weak spot of any operating system with open file system. Thousands of ransomware viruses, spyware Trojans and other malware types have been created for Android. To avoid computer infection, first and foremost it is advised to avoid downloading applications (as well as other files) from unknown sources. Public Wi-Fi hotspots are also a potential threat. If you frequently connect to a wireless network in cafes, city parks and other public places, then we highly recommend using an antivirus with a built-in firewall, or at least a VPN client. The latter protects your computer from a variety of network threats, prevents personal data from leaking to the Internet and makes you anonymous. Thus, we recommend paying attention to the applications presented in this category and pick the one that suits best. Especially since many of them are available for free (we suggest trying Turbo VPN, VPN Master, Opera VPN).
Of course, there are traditional antivirus solutions. A lot of well-known developers have released Android versions of their products. Some even merged desktop and mobile licenses into a single package, allowing users to save on purchasing the necessary security tools for all their devices. However, not all antivirus solutions require paid subscription. There are different applications which you can use for free, but they are in the minority. In some cases, programs that are related to system maintenance provide limited antivirus functionality. For example, a popular cleaning utility Clean Master is capable of detecting some types of malware. Nevertheless, such program cannot substitute a complete antivirus solution.