Lately, it seems like no outfit is complete without a wearable fitness tracker. With sleek designs and bright colors, the latest and greatest in self-quantifying technology are making their presence known on arms everywhere. Interested in joining the fitness-tracking pack? We've rounded up some of the most popular fitness trackers — including the Jawbone UP4, the Garmin Vivofit 2, and the Fitbit Charge HR — to help you compare features and prices. Read on to find the right fit for you, then check out which trackers are the most accurate here!