Here is a cool band that lets you do more with your Apple Watch. The Kardia Band is an Apple Watch accessory that provides you with medical-grade EKG anywhere. You will be able to get a reading by simply touching the band’s sensor. The Normal Detector feature allows you to find out when your heart rate and rhythm are normal.
Users can record voice memos with their readings and share them with their doctor. Kardia offers Apple Health integration. The Kardia Band simply helps you keep a closer eye on your heart. The bad news? You can’t buy it yet.[Source]