Mat HonanGearDec 3, 2012 9:30 AMReview: Jawbone UpRe-designed and re-launched, the Jawbone Up is a rubbery thing you wear on your wrist that works in concert with a smartphone app to track your activity, sleeping habits and meals.Photo by Ariel Zambelich/WiredCommentLoaderSave StorySave this storyCommentLoaderSave StorySave this story