core-motion

Read accelerometer and gyroscope data in an iOS app by instantiating CMMotionManager and starting device motion updates to consume raw and processed sensor inputs for interactive experiences.

Detect user activity like walking or running on watchOS by using CMMotionActivityManager to track activity types and CMPedometer to count steps for fitness and health monitoring features.

Track steps and altitude using CoreMotion by initializing CMPedometer for step counts and accessing processed device motion data to derive altitude changes for navigation and fitness applications.

You need a single CMMotionManager instance to access multiple motion sensors simultaneously, as it centrally manages accelerometer, gyroscope, magnetometer, and pedometer update streams for your iOS or watchOS app.

Device motion provides attitude and gravity data for AR apps by processing raw sensor inputs to derive device orientation, heading, and gravity vectors, enabling accurate spatial tracking and location-based interactions.

Common pitfalls when setting up motion sensor updates include creating multiple CMMotionManager instances, failing to properly start and stop update streams, and not handling sensor availability checks before accessing pedometer or activity data.