LIKE EVERY PIECE of gear you wear on your body day in and day out, fitness trackers are incredibly personal. They have to be comfortable and attractive, sure, but they must also fit your lifestyle, as well as when and how you like to work out. Do you bike, row, or do strength training? Do you run on trails for hours at a time, or do you just want a reminder to get up every hour?

No matter what your needs are, there’s never been a better time to find a powerful, sophisticated tool that can help you optimize your workouts or jump-start your routine. We’ve tested dozens over the years to bring you these picks. While you’re at it, don’t forget to check out our Best Smartwatches and Best Running Gear guides.