The problem with making it compatible with iOS is that it would need to hook into the notification system of iOS. I highly doubt that Apple makes those APIs available to the general public. Android Wear is basically an extension of notifications and would likely lose all but watch functionality when connected to an iOS device because iOS is a closed ecosystem. It is really a different story than the Hangouts example. Perhaps someone could get it connected to a jailbroken iOS device, but even then, I think it's a stretch.
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