Want a fitness tracker that can tell you when it's time to get moving, rather than simply record your movements? You won't have to wait long. Jaybird has confirmed that its Reign wristband will reach the US on October 26th at the $199 price promised back in January. The key to the Reign is its "Go-Score," which estimates your readiness for activity based on your heart rate variability -- the higher the score, the better-suited you are to going for a run or bike ride. It's also one of the few trackers that can handle swimming alongside exercise and sleep, so this may be your wearable of choice if you regularly hit the pool. So long as you have an Android or iOS device to pair with, the Reign may be worth checking out if you feel that other activity devices don't cover enough ground.