A device present in many mobile phones detects magnetic fields. A common application of this component is in navigation, facilitating the determination of direction and orientation. For example, it can ascertain which way the top of the phone is pointing relative to the Earth’s magnetic poles when used with location services on a popular operating system.
This technology offers several advantages to mobile applications. It provides the ability to create digital compasses and metal detectors. Historically, the presence of this component in a smartphone has significantly improved location-based services, allowing for more precise and reliable navigation experiences. This advancement has expanded application functionality from basic map orientation to complex augmented reality experiences.