View two dimensional objects in 3D with one eye.
Also emulates a rotator.
Useful for optometrists as part of a vision therapy program.
Fully supports AirPlay so you can display your rings on a secondary display (either wirelessly with Apple TV or with an HDMI adapter).
Includes the ability to change both the speed and direction of rotation. Also support Siri Shortcuts, so you can create your own shortcuts on the desktop to start exactly the chart you want at exactly the speed you want.