Google on Thursday unveiled its new Fitbit Air , a Whoop-like screenless wearable that retails for $100. The device includes health and fitness tracking features like 24/7 heart rate monitoring, heart rhythm monitoring with A-fib (atrial fibrillation) alerts, blood oxygen level, resting heart rate, heart rate variability, sleep stages and duration, and more. The tech giant said in a blog post that the device is aimed at people who find wearable devices to be too bulky, complicated, or expensive,