"There's an app for that." Who'd have ever thought that would be the case for something as fundamental as a ruler or a measuring tape? But here we are. If you're reading this, you may already know ...

The "Walking Steadiness" feature on iPhone can track how steady you are when walking and notify you if you're unsteady or at risk of falling.

You can use the ECG app on your Apple Watch to monitor your heart rate and detect irregularities, in which case you should ...

The latest health-tracking feature on the Apple Watch has life-changing implications. Here's how to turn it on, and how it works.