# Testing the [DeviceOrientation API](http://dev.w3.org/geo/api/spec-source-orientation)

## Test case: http://jsfiddle.net/TPz2G/2/show/

## Nexus S, Android 4.1.1

### Firefox Beta 22.0

* Alpha increases when rotating device **clockwise**
* Alpha is at 0° when device is **exactly south**

### Chrome Beta 27.0.1453.90

* Alpha increases when rotating device **counterclockwise**
* Alpha is at 0° when device is **approximately south**

### Android Browser 4.1.1
* Alpha increases when rotating device **counterclockwise**
* Alpha is at 0° when device is **exactly east**

### Opera Mobile 12.1.4
* Alpha increases when rotating device **counterclockwise**
* Alpha is at 0° when device is **exactly south**

## iPhone 5, iOS 6.1.4

### Mobile Safari
* Alpha increases when rotating device **counterclockwise**
* Alpha is at 0° where the **page loads**
* Includes `webkitCompassHeading` property, which is at 0° when device is **north**
* `webkitCompassHeading` increases when rotating device **clockwise**

### Chrome 26.0.1410.53
* _Same as Mobile Safari_