I'm an electrical engineer and know people who were on the first iPhone team. I think it was about as close to 0 to 1 as you get in a big company like that.
I worked for a major RF test and measurement company when the first iPhone came out and everyone was blown away that a company could design and tool up production for a cell phone without tipping anyone off in the industry.
I mean, google is not quite going from 0 to 1 there. it's a machine learning problem and google has some of the brightest machine learning people out there already working on search.
The iPhone was released in June 2007. At that point, the iPod models were Classic (click-wheel), Mini (click-wheel), Nano (click-wheel), and Shuffle (screenless).
The first iPod Touch wasn't until September 2007, 3 months after the first iPhone.
When the iPhone 1 was released, the iPod range didn't have much on any other MP3 player. All the things that make an iPhone an iPhone - the touch-screen, multi-touch, iOS, didn't come from the iPod.
Perhaps iPod to iPhone wasn't quite 0 to 1, but it wouldn't have been much more than 0.001 to 1.