: They optimized the code so photos would upload in the background, allowing users to keep scrolling while their 2-megapixel memories traveled to the cloud. The Launch
The developers didn't even have final hardware for most of the cycle. They worked on simulators, guessing how a thumb would feel sliding across glass instead of a trackball. Facebook 2.0 For Iphone 3G
: It set the blueprint for every social media app we use today—the infinite scroll, the tab bar, and the mobile notification. : They optimized the code so photos would
: Introducing the News Feed as a living, breathing stream. the tab bar