---
title: startDeviceMotionUpdates()
framework: coremotion
role: symbol
role_heading: Instance Method
path: coremotion/cmmotionmanager/startdevicemotionupdates()
---

# startDeviceMotionUpdates()

Starts device-motion updates without a block handler.

## Declaration

```swift
func startDeviceMotionUpdates()
```

## Discussion

Discussion You can get the latest device-motion data through the deviceMotion property. You must call stopDeviceMotionUpdates() when you no longer want your app to process device-motion updates. This method uses the reference frame returned by attitudeReferenceFrame for device-motion updates.

## See Also

### Managing Device Motion Updates

- [showsDeviceMovementDisplay](coremotion/cmmotionmanager/showsdevicemovementdisplay.md)
- [deviceMotionUpdateInterval](coremotion/cmmotionmanager/devicemotionupdateinterval.md)
- [startDeviceMotionUpdates(using:to:withHandler:)](coremotion/cmmotionmanager/startdevicemotionupdates(using:to:withhandler:).md)
- [startDeviceMotionUpdates(to:withHandler:)](coremotion/cmmotionmanager/startdevicemotionupdates(to:withhandler:).md)
- [startDeviceMotionUpdates(using:)](coremotion/cmmotionmanager/startdevicemotionupdates(using:).md)
- [stopDeviceMotionUpdates()](coremotion/cmmotionmanager/stopdevicemotionupdates().md)
- [deviceMotion](coremotion/cmmotionmanager/devicemotion.md)
- [CMDeviceMotionHandler](coremotion/cmdevicemotionhandler.md)