similarities with blood pressure monitoring

In contemplating whether it will crack big time sales , I think thought should be given to blood pressure monitoring.
As far as I can see , anyone who has even a slight blood pressure problem owns a $150 (approx) electronic device.
Both health conditions risk death and in case of blood pressure, stroke.
In both cases historical data (outside of GP's room) is useful. Often a GP will ask a patient to hand record blood pressure readings.
I think the market is there big time and is waiting for the device as the company seems to suggest.