Reply to post: Re: to think the cheap plastic on your arm is as good as a lab

Re: to think the cheap plastic on your arm is as good as a lab

I shouldn't think they do expect it to be as good as a lab. But it would not be unreasonable to believe (or perhaps hope) that the devices, given the marketing, get within 10% or so of an accurate figure, so they can at least be used as a general guide for how you are doing.