SRSensorUsagePPG A collection of properties that explains your app’s need to observe the person’s photoplethysmogram sensor data. TopicsSensor usage keysDescriptionRequired See AlsoUser ActivitySRSensorUsageECGSRSensorUsageElevationSRSensorUsageFacialMetricsSRSensorUsageHeartRateSRSensorUsageMediaEventsSRSensorUsageMotionSRSensorUsageOdometerSRSensorUsagePedometerSRSensorUsageSpeechMetricsSRSensorUsageVisitsSRSensorUsageWristTemperature