title: What is the maximum frequency for magnetometerUpdateInterval?
body: <p>What is the maximum frequency for magnetometerUpdateInterval? i cannot find any Apple documentation over this or posts about this.  I know for the accelerometer it peaks around 107 Hz and for the gyroscope it peaks around 76 Hz.  However, I fear that the magnetometer will be a lot less than this do to it settling to the magnetic field.</p>