---
title: HKMetadataKeyAppleDeviceCalibrated
framework: healthkit
role: symbol
role_heading: Global Variable
path: healthkit/hkmetadatakeyappledevicecalibrated
---

# HKMetadataKeyAppleDeviceCalibrated

The key for metadata indicating whether the system had data from a sufficient amount of calibrated sensors when recording the sample.

## Declaration

```swift
let HKMetadataKeyAppleDeviceCalibrated: String
```

## Discussion

Discussion This key takes a Boolean value. If it’s true, the system has enough high-quality data to make an accurate estimate. If it’s false, the system provides an estimate based on data that may be less accurate. The key is read-only.

## See Also

### Device Information Keys

- [HKMetadataKeyDeviceSerialNumber](healthkit/hkmetadatakeydeviceserialnumber.md)
- [HKMetadataKeyUDIDeviceIdentifier](healthkit/hkmetadatakeyudideviceidentifier.md)
- [HKMetadataKeyUDIProductionIdentifier](healthkit/hkmetadatakeyudiproductionidentifier.md)
- [HKMetadataKeyDigitalSignature](healthkit/hkmetadatakeydigitalsignature.md)
- [HKMetadataKeyDeviceName](healthkit/hkmetadatakeydevicename.md)
- [HKMetadataKeyDeviceManufacturerName](healthkit/hkmetadatakeydevicemanufacturername.md)
- [HKMetadataKeyDevicePlacementSide](healthkit/hkmetadatakeydeviceplacementside.md)
- [HKDevicePlacementSide](healthkit/hkdeviceplacementside.md)