From The Apple Wiki
NonUIConsoleViewer's Icon
Inside NonUIConsoleViewer

NonUIConsoleViewer, which is presented simply as "Console" on, is an app that is shipped in later builds of SwitchBoard. Its first known appearance is in Sochi 11D31620l. The app shows the contents of /private/var/mobile/log.txt, as shown below, but as of yet there has not been an instance in which anything shows up. One theory is that it is intended to show the output of console execs such as SwitchBoard:_/usr/local/bin. The latest known build is 1.21.

This application is typically located under /AppleInternal/Applications/SwitchBoard/

Contents of the app

Info.plist					_CodeSignature
NonUIConsoleViewer				_internal_terminal.png