List of iOS devices that support compass/geomagnetic field

I am developing an augmented reality iOS app (iPhone/iPad/iPod) and I would like to have a list of devices where this feature is supported. I mean the compass and the geomagnetic field so that I can get the orientation of the device in all degrees开发者_如何学编程 of freedom.

Thanks!

The compass is available on all iPads and on the iPhone 3GS and 4.

I was also wondering if there are any devices left capable of running iOS7 or iOS8 without compass feature and a quick research pointed out the following:

Compass available:

• on any iPhone 3GS or later. iOS7 support from iPhone 4 or later, iOS8 support from 4S or later.
• on any iPad. iOS7 and iOS8 support starts with iPad 2 or later.

Compass not available:

• on any iPod touch. 5th generation (current model as of 2015) does support iOS7 and iOS8

So if you design an application for iOS7 or iOS8 and only for the iPhone/iPad there will be heading available. For the iPod touch not.

Compass does not provide orientation in all degrees of freedom, although you can get that data from the orientation sensors.

You should also look at the gyroscope (iPhone4 and iPod touch 4 only so far), which provides much more accurate and faster orientation sensing in all degrees of freedom, see UFO on Tape for an excellent example.