MotionX has released an update to MotionX Sleep, its iPhone app for optimizing sleep cycles and promoting healthy activity. Designed to help users get a better night’s rest and be more active, MotionX Sleep uses the iPhone sensors to track and analyze movements during sleep to monitor the user’s sleep cycles and provide optimal wake-up alarms; users can wake to their favourite iPod song or choose from a set of built-in sounds such as jungle,…