Android's market share on telephones and tablets makes it a significant target for malware, and reports of Android-specific malware are on the rise. That's problematic for Kindle owners as well, given that the Kindle OS is built on Android. It's prudent to install protective software on your Kindle Fires, to limit the risk of conducting malware to your computer network or exposing your company's data to malicious outsiders. The apps' additional protection features can justify the cost, even if none of your users ever encounter malware.