Zuckerberg was wrong. Google's Android and Apple's iOS quickly became the dominant mobile operating systems, and Facebook's applications, which were built with its CEO's web-centric worldview in mind, didn't work well on either platform. They were buggy and slow, crashing often. A 2011 update garnered 19,000 one-star reviews in the Apple App Store within the first month. "It's probably one of the biggest mistakes we've ever made," Zuckerberg tells me during an interview at Facebook's Menlo Park, Calif., headquarters in late March.
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