sensorkit

SensorKit authorization for multiple sensors requires configuring the com.apple.developer.sensorkit.reader.allow entitlement, adding NSSensorKitUsageDescription keys, and calling SRSensorReader to request per-sensor user authorization. Apple-approved research study eligibility is required before requesting access.

Your SensorKit fetch request likely returns no data or an SRError because of the mandatory 24-hour data holding period. Historical sensor samples are only accessible after this holding window passes, and SRError cases must be handled in your delegate callbacks to ensure reliable data pipelines.

Setting up SensorKit for iOS requires the com.apple.developer.sensorkit.reader.allow entitlement, along with NSSensorKitUsageDescription, PrivacyPolicyURL, and UsageDetail keys in your Info.plist. These configurations are mandatory for Apple-approved research study eligibility and user authorization.

To fetch historical sensor data by time range and device, you create an SRFetchRequest specifying the desired time window and target device, then execute it via SRSensorReader. Results are delivered through per-sensor delegate callbacks after the 24-hour data holding period.

Yes, you can use SensorKit to collect keyboard metrics, ambient light, and device usage reports for a sleep study. It supports starting and stopping recording for these sensors and fetching historical samples to build a research dataset after the holding window.

Yes, accessing watchOS biometric sensor data through SensorKit requires Apple-approved research study eligibility. You must obtain the SensorKit reader entitlement and handle per-sensor delegate callbacks to collect ambient, motion, usage, and biometric data legally.