At 3 days to develop, the author could make 100 of these apps a year. Of course, they will probably spend additional time developing and fixing bugs, IF the ap

At 3 days to develop, the author could make 100 of these apps a year. Of course, they will probably spend additional time developing and fixing bugs, IF the app gets any traction. And if it becomes something more substantial, they could up the price or release a preium in app purchase to upgrade with new features.