Heart disease is the number one cause of death in the US. An EKG is the easiest way to detect warning signs like atrial fibrillation early. It also usually requires a trip to the doctor. The AliveCor Kardia Mobile EKG lets you take a medical-grade EKG in just 30 seconds wherever you are. Just place your fingers on the electrodes, and it will get your reading, then use a series of neural networks and algorithms to identify potential problems. Most likely, things will check out. But if they don't, the red flags raised could save your life.