fit bit. none of them have been approved by the fda. you don't want to wear them for clinical purposes. this is really just a fitness tracking. >> is there value in interfacing with your doctor or someone concerned about your health, can they play any role? >> it depends on who your doctor is. if you have a traditional doctor not used to looking at this kind of data, they might just ask you to put it away or ignore it. if you have a doctor who is interested and they want to talk to you about your steps and sleep, it might be useful to bring along some devices. >> i think i might like to see some of that info. it gives me some idea. all of these devices are out there, and this is your phone, the phone was actually better than some of the trackers. >> i have been tracking my own steps today coming from the