Twitter is preparing for its biggest product redesign in close to two years, with a complete overhaul of its popular mobile app in progress as the company looks to attract a larger, more mainstream audience ahead of its IPO, reports AllThingsD.

While they have not commented officially, AllThingsD’s sources say that Twitter is waiting for the release of Apple’s much-hyped iOS 7 operating system before releasing an initial update to their iPhone and iPad apps, with a richer, from-the-ground-up revamp expected later this year.

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