The band works in conjunction with the new Kardia Watch app and you can take an ECG reading just by pressing a sensor on the watch strap. What's more, AliveCor says that the band and app can detect Atrial Fibrillation to instantly alert of a stroke. Everything links in with the Apple Health app as well to help paint a better picture of your overall wellness. There's no word of pricing or availability yet for the Kardia band, but the app is available for Android and iOS right now.