Many people want to change their unhealthy lifestyle, especially college students who do not have time for exercise and eat without counting calories. There is general wellness device called Withings pulse Ox can help someone be more active and improve health by tracking daily activities. During the day it captures steps, distance walked, elevation climbed and calories burned. At night, it monitors your sleep cycles. And when asked, it measures your heart rate and blood oxygen level. With this data at hand, Pulse Ox reinforces your motivation, instantly know how many calories you burned on daily basis. I would say this Pulse Ox device is in the first categories because product monitors a general wellness activities that does not diagnose or treat disease.
http://www.withings.com/us/en/products/pulse