iPhones made in 2014+ have a barometer for real-time elevation tracking. A barometer measures air pressure, which is crucial for calculating altitude changes. The native iPhone Compass app has a built ...

Alan says he's heard that watching a barometer can help one to make a weather forecast, and he wants to know how that works. Much of modern weather forecasting requires the processing capabilities of ...

I've had a couple of recent e-mails asking about barometer readings, what they measure and what those readings mean. What a barometer measures is the weight of the air above it. The standard ...