<!--
{
  "availability" : [
    "iOS: 4.0.0 -",
    "iPadOS: 4.0.0 -",
    "macCatalyst: 13.1.0 -",
    "macOS: 10.15.0 -",
    "visionOS: 1.0.0 -",
    "watchOS: 2.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "CoreMotion",
  "identifier" : "/documentation/CoreMotion/CMGyroData/rotationRate",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Property",
  "symbol" : {
    "kind" : "Instance Property",
    "modules" : [
      "Core Motion"
    ],
    "preciseIdentifier" : "c:objc(cs)CMGyroData(py)rotationRate"
  },
  "title" : "rotationRate"
}
-->

# rotationRate

The rotation rate as measured by the device’s gyroscope.

```
var rotationRate: CMRotationRate { get }
```

## Discussion

This property yields a measurement of the device’s rate of rotation around three axes. Whereas this property gives the raw data from the gyroscope, the identically named property of [`CMDeviceMotion`](/documentation/CoreMotion/CMDeviceMotion) gives a [`CMRotationRate`](/documentation/CoreMotion/CMRotationRate) structure measuring gyroscope data whose bias has been removed by Core Motion algorithms.

## See Also

  [Event Handling Guide for UIKit Apps](https://developer.apple.com/library/archive/documentation/EventHandling/Conceptual/EventHandlingiPhoneOS/index.html?language=swift#//apple_ref/doc/uid/TP40009541)


---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)