Good news! Withings just built a new partnership with the winning award iPhone app iBody! Developed by the German company iHanWel, this app is famous for gathering all your body information in one place: weight, body measurement, blood pressure and all the other body values.
Furthermore, iBody has a fitness journal and a GPS tracking module to track the distance you cover at each workout. Your iPhone becomes your personal health advisor. A demo video is available, so that you can really see the potential of this app.