This article discusses software internally used by Apple.
Acquiring a copy without Apple's consent is illegal and may result in being scammed.
VIOSimple is an early AR demo for SwitchBoard devices that was first discovered on TigrisAni 15A93261h. It creates a rocket ship object when the camera is focused on a flat surface. VIOSimple also functions on stock versions of iOS 11.0 and above.
It is unknown what VIO stands for, possibly Visual Input/Output. A partial meaning is revealed in Info.plist.
<key>NSCameraUsageDescription</key> <string>The "V" in VIO stands for Visual.</string>