Sleep trackers, whether in smart mattresses, wearable fitness trackers, or sleep apps, promise accurate sleep metrics to help you learn about your rest. But if you want understand, and even improve, your sleep, are smart beds or sleep trackers better?
Smart mattresses feature embedded sensors, capable of measuring your every heartbeat, but for this fine detail you have to pay a high price. Sleep tracking wearables are more affordable, but drawing information from just one part of your body, they're also less accurate.
