Why does the iPhone have a barometer? (And how to use it)

Of all the features you may have noticed on your iPhone, one that stands out is the Barometer. What does this tool do, and ...
WMAZ

Weather Works: What is a barometer and how does it work?

MACON, Ga. — High pressure and low pressure systems dictate most of the weather in Central Georgia. To measure pressure in the atmosphere meteorologists use a barometer. If you split the word ...