Discover the best no cloud fitness trackers that keep your health data local. 5 honest, expert-picked devices for complete data privacy. We wrangled a team of competitive weightlifters, personal trainers, and CrossFit coaches to test the best fitness trackers on the market, from watches to rings. The best fitness tracker for you will depend on your needs, and this guide highlights the top options for a range of budgets and goals. These are the best fitness trackers, smartwatches, and smart rings for monitoring activity, sleep, and more. Fitness wearables can help you move more, sleep better, and stay healthy. Here's how to pick the right one for you, along with the top fitness trackers we've tested.