A quick search on Amazon turned up a few. Most of the ones I saw don't seem to have good ratings. I think these are mostly Chinese watches, so who knows how reliable they are. I use a BP wrist monitor which is only worn at the time of checking the BP. I had my doctors office verify its accuracy. Not sure I would want to rely on a Chinese watch when companies like Apple haven't even added that feature. The wrist BP monitor automatically swells up around my wrist just like the ones the doctors use. I cannot see how the watches would do that based on the photos they show.