BonFire

From The Apple Wiki

BonFire is an Apple internal software used for log collection and device information for BurnIn, Inferno, and Earthbound for tests; almost nothing is known about it. It is a diagnostic SpringBoard alternative like BurnIn, SkankPhone and Inferno.

Bonfire running on an iPhone 6 PVT Prototype
Bonfire running on an iPad Mini 2 Prototype