With shiftscreen you can use an external display as an external, second display for your iPad edge to edge.
You are able to control the picture on the monitor while using other apps on the iPad itself in split-view.
View documents and websites on your monitor while working on your iPad.
Finally make use of the monitor size. The aspect ratio and resolution of your device is irrelvant.
Intuitive design, minimalistic and clean UI and an illustrative introduction make shiftscreen very easy to use.
With shiftscreen you can take screenshots of both your device and the connected display.
You can freeze displayed windows or the whole display with a single tap.
There are also many more planned functions like controller support, Siri Shortcuts integration and adding keyboard shortcuts.