Google+ may have grabbed as many as 18 million users just three weeks after its initial launch.
Stats compiled by Ancestry.com co-founder and Google+ "unofficial statistician" Paul Allen (no relation to Microsoft's famous co-founder) show that Google's new social network could've hit the 18 millilon mark by the end of yesterday.
Measuring the number of Google+ users based on random surnames each day, Allen pointed to two days last week alone when more than two million users signed up in a single day.
Despite the huge numbers estimated by Allen, Google+ has actually seen a bit of a slowdown over the past few days following its initial growth spurt. In his research, the "statistician" found that the social network captured only 763,000 new members on Monday, a growth rate of 4.47 percent and the lowest since Google started opening up invites to the site July 6.
The recent slowdown may stem from the fact that Google hasn't marketed Google+ through any of its other channels or services. Once it does, Allen expects to see millions of people hop onto the service each day over a certain period of time. The company is reportedly trying to lure more celebrities to the site in an attempt to generate some buzz.
Allen does concede that his model for calculating the number of users may have some "weaknesses." The search giant's CEO, Larry Page, announced last Thursday that the site had captured more than 10 million members at the same time that Allen's research showed a total of 13 million.
"I suppose my model could be overstating the actual usercount by 30-35 percent," Allen said in his Google+ post. "But if Google+ actually hit 10 million a day or two before the formal announcement, then my model may still be spot on."Meanwhile, the Google+ iOS app, which launched just yesterday, has already climbed the charts to become the top free iPhone app in Apple's App Store.
Like its Android counterpart, the iOS app lets users monitor posts from people they follow, incoming posts from people who follow them, and posts from people located in nearby geographic areas. Users can also send posts to their "circles," the groups of friends, family, and other aquaintances that they can create.
However, the current version of the iOS app works only on the iPhone. iPod Touch and iPad users are out of luck, at least for now.
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