Meet the all new Withings Pulse O₂: a wearable device to monitor your activity and sleep, read your vital signs, and more. It offers sleep analysis, which you can track on your iOS device. It is pretty compact and can be worn like a watch or anyway you like for that matter. It provides you with elevation/running analysis and tells you how many calories you have burned. You can also track your history at any time. As you can see in the below video, Pulse O₂ also measures your blood oxygen level and heart rate.
The Withings Pulse O₂ is compatible with iOS and Android devices. It uses gamification and coaching to keep you in top shape. You can get it for $119.95 at this time.