half offtopic: do I need an AV software on my android smartphone? Friends always ask me which they should use (because I am the "computer guy") and I tell them that I don't have one.
Of course, you have to look at what you're downloading from the stores, Google Play isn't aggressively pre-moderated like the Apple App Store. Still, apps are sandboxed and can't do really evil shit without special permissions. Make sure these random apps don't request the "draw over other apps" one.
