@Rachael161, Hi, URGravity doesn't make health sensing devices, they use the data that these devices collect and find patterns in your data and then allow you to share it with your health professionals(Doctor, Personal Trainer, Dietician, Nutritionist). They support the best devices on the market and let you choose the ones that work best for you. Each of the sensors has its strengths and weaknesses; pick the one that works best for you. Some go on our bicep, your wrist or can be clipped just about anywhere to your body as Ss253 pointed out. Here's a link to more info. http://www.urgravity.com/Home/FAQ?Length=4.
They also work directly with the manufacturers to pass along any savings they get to you. http://www.urgravity.com/Store.
It also uses the FatSecret service to manage your diet and calories.
@Ss253, Hi, The Fitbit basic service is free. It collects a bunch of information from the sensor. It even puts this information in a graph for you. While this is interesting it doesn't help you reach your health goals, it isn't actionable. Fitbit has a paid service that does some of this for you but Fitbit is primarily in the business of selling devices, and they make some great devices.
URGravity focuses on making you healthy - Starting with your activity level, your diet, your weight, your blood pressure and your sleep patterns. Scientific studies have shown that while just about anyone can lose weight and improve their health these gains are often lost because people don't change their habits. URGravity identifies those patterns and helps you make good decisions so that the hard work you put into getting healthy isn't wasted. I know, I've lost 45 pounds using the service and have kept it off for more than a year now. They offer a free 30 day trial that lets you use all of the service features.