I was also fed up with inaccurate readings, and was trying to prototype a medical device that would have an adjustable cuff based on arm size. I ran it by my co

I was also fed up with inaccurate readings, and was trying to prototype a medical device that would have an adjustable cuff based on arm size. I ran it by my concierge doc, but apparently the latest tech is to use light waves to measure BP, similar to how wearables are doing pulse OX and Heart Rate. The technique is known as Photoplethysmography (PPG).