Compatible with iOS 8 to 12
Lookin Loader dynamically loads LookinServer (Lookin.app support) into iOS apps on jailbroken devices. Configuration is via the Lookin menu in Settings.app.
You can inspect and modify views in iOS app via Lookin, just like UI Inspector in Xcode, or another app called Reveal.
And you can do more with features like Console or Method Trace.
Moreover, Lookin can run on your iPhone or iPad without connecting to a Mac.
And one more thing, Lookin is free.
Source code available on Github
Configure options from Settings.
See larger Screenshots below...