Dont waste your money.
The app has not been updated in months and it wasnt very accurate to begin with. After the iOS 9.3 update, it doesnt work at all. (Ultra inaccurate and no ability to sync) The latest iOS has been in Beta testing for many months so this app developer should have been more than ready to support their app in the new 9.3. Unless the dev gets to work and brings their product support up to an acceptable level, steer clear and save your money...!
BarNut about
Sleep Tracker - Sleep Pulse 3