AliveCor’s KardiaMobile 6L promises to be much more accurate than the heart monitor built into Apple Watch Series 4, and almost as easy to carry around. It’s the first personal ECG with three electrodes approved by the FDA to check the electrical activity of the heart.

We put this ultra-portable iPhone accessory to the test, as well as the more basic single-lead KardiaMobile, so don’t miss our reviews of each.

The Apple Watch’s EKG heart rate monitor has possibly saved the life of yet another person.

According to a new report, the Apple Watch belonging to a man in Bothell, Washington was used to diagnose atrial fibrillation. Sometimes shortened to “a-fib” or “AF,” this refers to an irregular, fast heartbeat. It even won over skeptical medics in the process.

Apple’s latest iPhone lineup is its most expensive yet, with prices starting at $999 for the iPhone XS and $1,099 for the iPhone XS Max. But Apple CEO Tim Cook doesn’t see a problem with that.

In an interview with Good Morning America this week, Cook again defended Apple’s price tags, talked about Apple Watch Series 4, and explained why some devices have avoided price hikes amidst America’s trade war with China.

At yesterday’s iPhone and Apple Watch event, Apple revealed that it has received Food and Drug Administration clearance for the Apple Watch Series 4’s new electrocardiogram feature. In theory, this marks the ascension of the Apple Watch from a wellness health tracker to a full-fledged medical device.

But people shouldn’t be too quick to jump to conclusions about the Apple Watch’s FDA-approval stamp. Adam Masin, a litigator who deals with medical device manufacturers in product liability lawsuits, made a few crucial points on Twitter.