After years of flailing mediocrity, smartwatches have gotten good enough to be mainstream. Two devices released in the last month, the Apple Watch Series 3 and the Fitbit Ionic, are the best we've seen. Not only are they both very, very good at telling time, they're also capable of myriad other things your Rolex or Timex is not. I've worn the wristables for the last two weeks, testing their functions and trying to find and answer to one big question: Which smartwatch is best?