A fitness tracker can be a game changer in your workouts. Or it can become a one-week novelty, destined to be forgotten about the first time you take it off to charge. So how do you choose one that will be the former? First, since you’re going to wear it every day, the one you choose has to feel good, look good and easily stay on your wrist through everything you do all day, whether you’re a runner, biker, swimmer or toddler wrangler. The other important element to consider is just how much data you want to track. Some people geek out over their VO~2~ max (the maximum rate of oxygen consumed during a workout), while others just want to win the 10K-steps-a-day office challenge. Understanding what your needs are can help you tune into the best tracker for you.