This is not a stand alone app. Moon widgets require KWGT PRO application ( not free version of this
What you need:
✔ KWGT PRO App
✔ Custom launcher like a Nova launcher
How to install:
✔ Download OWL KWGT and KWGT PRO application
✔ Long tap on your homescreen and choose Widget
✔ Choose KWGT Widget
✔ Tap on the widget and choose installed OWL KWGT.
✔ Choose widget which you like.
If the widget is not right sized use the scaling in the KWGT option to apply correctly size