Rumors surrounding a Google social network came to a head on Saturday as a leak provided early details of how it would work and a heavy mobile component. Now thought to be called Google +1 to reflect a cornerstone 'like' feature, it would be significantly different compared Facebook and focus on an optional browser extension instead of a website. An iPhone app would figure prominently not just in the service but in clues as to the overall strategy, TechCrunch was told alongside the rumor: tentatively called Loop, the app would reflect social circles known as "loops"