10 Wellness device for collecting sleep data, namely, brain waves, heart rate, oxygen saturation, and/or body movement, analyzing that sleep data in relation to one or more sleep performance metrics, and/or making recommendations to improve the quality and/or quantity of a user's sleep as well as providing stimulation in the form of sound waves, light and/or electrical signals to a user to improve the quality and/or quantity of the user's sleep and its restorative benefits featuring software for collecting and analyzing sleep data and providing stimulation to a user; headband and software for collecting and analyzing sleep data and providing stimulation to a user