In addition to the software, Facebook is also working with phone manufacturers to preload Home on certain smartphones out of the box, with the first, appropriately so, being HTC's First smartphone.
Home appears poised to provide Facebook with a whole new set of data about the activity of its users, although responses to questions on that issue were somewhat vague.
"Our analytics will be very quickly anonymized after a short period of time," which will encompass only one-half a percent of Facebook's user base, said Adam Mosseri, director of products at Facebook. The analytics will shift week over week so that "everyone carries the weight," the company added.
Still, all the analytics will be performed for the sake of improving the performance of the physical smartphone, not to feed more data into Facebook, Zuckerberg added.
How Home will be monetized was not immediately clear. Starting out, there will be no ads on the software, Zuckerberg said, "but at some point there will be."
Android is the most widely used smartphone operating system, representing nearly 60 percent of worldwide smartphone shipments in 2012, Analysys Mason said in its survey.
Facebook has been under pressure to engage users more deeply on mobile devices, and in particular to show them more advertisements, as more people move away from its services on the desktop.
Advertisers have not transitioned to mobile as dramatically as end users. Facebook's mobile business still only accounts for 23 percent of its total advertising revenue.
Yet in January, Facebook reported that the number of daily mobile users had exceeded daily Web users for the first time ever in 2012's fourth quarter.