So many fitness trackers — and so few of them that can do more than one thing. The Atlas Fitness Tracker promises to track everything. This wrist-mounted device features an active display, a heart rate monitor, x, y, and z axis tracking and advanced software. It knows what exercise you're doing, and can also give you feedback on whether you're cheating or using proper form. It's waterproof, so it can also track swimming exercises, and knows the difference between breaststroke, freestyle, and everything else. In addition, it can actually learn new exercises, so whether you're training at your local gym of lifting boulders and swinging swords in the wilderness, it can adapt. Try that with your average clip-on sensor.