I download apps all the time to review. You might download apps to play games, or just for utilities. But some of those apps might be doing more than just turning your phone into a flashlight. They might be malware, or they could be taking more personal information than you know.
That is where TrustGo comes in. They look at the apps, then let you know if this app is safe to download. For Android (working on iOS), you install this app, then let it scan other apps that download.
This is technically not anti-virus, because TrustGo does a lot more. In this day and age, malware is only one threat.
TrustGo is available now for you to download.