Ultra‐low‐cost mechanical smartphone attachment for blood pressure measurement [pdf]

they say "smartphone" but surely phone makers will find a way to sell it as an uber-expensive accessory, because apparently selling phones with 60% profit margin is not enough for the sorry greedy crowd that is now called tech.

My old samsung S10 was and is a great phone, with built-in SpO2 monitor, headphone jack and FM radio. The new ones are heavier yet don't have any of these because samsung wants to sell watches and earphones. it just really bothered me and i feel scammed

I had one of these on my Samsung S5