Device that receives REM sleep data from sleep tracker device and waits until the REM sleep is over before starting wake-up alarm
Wake-up Alarm device is linked up with Sleep Tracker device like FitBit which monitors REM sleep using subject's heartbeat and body temperature, receives REM sleep start and end times and how deep REM sleep is and uses this data in an algorithm (software program) that decides whether to sound the wake-up alarm in order to provide most healthy sleep. If the subject has not have had enough REM sleep for the night and is in REM sleep at the alarm time then Wake-up Alarm device waits until the REM sleep is over. Also, if the subject is in deep REM sleep and subject set the Wake-up Alarm device to always wait for deep REM sleep to be over then the Wake-up Alarm device waits otherwise it starts the alarm and wakes up the subject. Block Diagram shows the Wake-up Alarm+Sleep Tracker system.