Those who live the "connected selves" life like to keep track of many data points, including blood pressure. One of the finest connected blood pressure monitors available today is the QardioArm Blood Pressure Monitor (Apple World Today review link), which has been available in Apple's online store since December of 2015. Now you'll be able to find the $99.95 QardioArm at your local Apple retail store.
Oddly, the online Apple Store is currently showing "unavailable" status for the device, which uses four AAA batteries and connects to any device using iOS 8 or later. The Qardio Blood Pressure Monitor and Weight Tracker app (free) is required. The app works with Apple's Health app to track your BP and pass it along to other apps (for example, the wonderful Streaks app), and also includes an Apple Watch companion so that readings can be taken with a tap on the wrist.
Qardio's hardware meets US and European standards, and this is one of the few FDA-approved blood pressure monitors you'll find. If you don't currently own a connected blood pressure monitor, check out our review, then head to your local Apple retail store to buy a QardioArm.