Your iPhone has a built-in barometer — Here's how to use it

The iPhone's barometer is easy to overlook, but it's one of several sensors working behind the scenes every day, collecting data most users haven't seen.

The iPhone&#39;s barometer is easy to overlook, but it&#39;s one of several sensors working behind the scenes every day, collecting data most users haven&#39;t seen.<p><img src="https://www.engadget.com/img/gallery/your-iphone-has-a-built-in-barometer-heres-how-to-use-it/intro-1794248048.jpg" /></p>