Just a quick note that there's a new product available at the online Apple Store in the US and Canada... as well as about 30 other countries. No, it's not an ugly battery case for the iPhone 6s; instead, it's the nice-looking and well-designed QardioArm smart blood pressure monitor ($99.99).
Unlike some of the BP monitors on the market, QardioArm is clinically validated and was the first medical device to offer integration with Apple Health. QardioArm has been approved by the US Food and Drug Administration and is also the first medical device that has been designed to work with the Apple Watch, letting users start measurements by just tapping the Watch app.
QardioArm works off of four AAA batteries and uses Bluetooth 4 to communicate with your iOS devices. The free app is available on the iOS App Store, working with the 10.93 ounce (310 gram) device to measure your blood pressure anywhere you may happen to be.