I'll be honest: I full expected to download a virus when I found the Deep Color app on iOS. It was from an unknown developer, had no ratings, and I've always seen the inside of my head from rolling my eyes so hard at services that claim to "convert" black and white photos to color.
As I downloaded it, I thought to myself, "Cool, I'll get a new phone when this one inevitably gets fried or hacked." Then upon opening it, the app prompted me that it needed to download... something but didn't say what. "Cool," I thought again, "load that malware right on in."