Withings has a wireless blood pressure cuff, and makes the data available through a Web API for services like exist.io.
BodyMedia's FIT detects when you lie down and get up (so no need to push any buttons), and you don't need to transfer the device into an awkward wrist strap (since you're wearing it on your upper arm).
BodyMedia's FIT detects when you lie down and get up (so no need to push any buttons), and you don't need to transfer the device into an awkward wrist strap (since you're wearing it on your upper arm).