How to use your iPhone to get in shape and stay healthy - CNBC

Apple's main selling point for the Apple Watch is tracking your health, including activity, sleep and certain medical conditions.

But the Health app built-into your iPhone can do a lot more, like tracking how long you practice mindfulness through third-party apps, determining how long you spent in bed, your walking speed and more.

The Health app can automatically track the number of steps you take in a day.

If you install those apps you'll get a prompt to save information to Apple Health and, once you do, you can keep track of how long you meditate each day over time inside the app.

You need an Apple Watch to track your sleep, but the iPhone can keep track of how long you're in bed, and save that information.

The health checklist can also help you set up the Emergency SOS, a feature on your iPhone that will automatically call emergency services if you tap the side button of the phone 5 times in rapid succession.