---
title: SensorKit updates
framework: updates
role: article
role_heading: Article
path: updates/sensorkit
---

# SensorKit updates

Learn about important changes to SensorKit.

## Overview

Overview Browse notable changes in SensorKit. March 2024 Sensors Use the electrocardiogram property to collect electrocardiogram (ECG) data samples, and the pedometerData class to get the data. Use the photoplethysmogram property to collect photoplethysmogram (PPG) data samples, and the SRPhotoplethysmogramOpticalSample and SRPhotoplethysmogramSample classes to get the data. June 2023 Sensors Use the faceMetrics property to analyze a person’s facial expressions, and the SRFaceMetrics class to get the data. Use the heartRate property to collect a person’s heart rate from devices, and the CMHighFrequencyHeartRateData class to get the data. Use the odometer property to analyze movements during workouts, and the CMOdometerData class to get the data. Use the siriSpeechMetrics property to collect data about a person’s voice — such as tenor, pitch, and cadence — and the SRSpeechMetrics class to get the data. People who previously authorized speech metric data collection need to reauthorize before data collection can continue. Use the wristTemperature property to collect sequential wrist temperatures while a person is sleeping, and the SRWristTemperature class to get the data. Configuration To opt out of collecting data for user activity from sensors in your app, set the SRResearchDataGeneration key to NO.

## See Also

### Technology and frameworks

- [Accelerate updates](updates/accelerate.md)
- [Accessibility updates](updates/accessibility.md)
- [ActivityKit updates](updates/activitykit.md)
- [AdAttributionKit Updates](updates/adattributionkit.md)
- [App Clips updates](updates/appclips.md)
- [App Intents updates](updates/appintents.md)
- [AppKit updates](updates/appkit.md)
- [Apple Intelligence updates](updates/apple-intelligence.md)
- [AppleMapsServerAPI Updates](updates/applemapsserverapi.md)
- [Apple Pencil updates](updates/applepencil.md)
- [ARKit updates](updates/arkit.md)
- [Audio Toolbox updates](updates/audiotoolbox.md)
- [AuthenticationServices updates](updates/authenticationservices.md)
- [AVFAudio updates](updates/avfaudio.md)
- [AVFoundation updates](updates/avfoundation.md)