How I Built an iPhone and iPad App for Sleep

Marco Arment: The original idea was this is for people going to sleep. And so like even the sounds and how I like design the sounds were very focused on the iPhone speakers. He added iPad support because you can and it's not that big of a deal if you build it, you know, so that it lays out at different sizes. "I just got inundated with people that wanted a Mac app," he says.