Let us give you a step-by-step breakdown of how to check blood pressure on the Apple Watch:
On your Apple Watch, launch the Qardio app and hit the [START] button.
Put your QardioArm on your left arm so it is ready to inflate before you do this.
The measurement will start when you press the [START] button on your Apple Watch.
Through your Apple Watch, you can also view your measurement history and create reminders.