Moon night is an app that monitors your sleep quality and gives suggestions on how to improve the quality. 
With the connection to the watch, it would automatically start when you sleep, it would match the time of your sleep, heartbeat and snore, then it would create a report and send it over to your phone along with suggestions of how to improve your quality.
The color purple gives us a chilling feeling when we sleep, some articles identify human bodies and also can recognize the color of the bed and it would send the information to the brain and cooler color beds would make your sleep have even nicer quality.