This is not a standalone application. The theme requires the Kustom Live Wallpaper PRO application (it is not a free version of this application).

RS-NEUMORPHIS-3 theme for KLWP supports all screen proportions.

What do you need:
✔ Kustom (KLWP) PRO
✔ Compatible launcher that is KLWP compatible (Nova Launcher launcher recommended)

How to install:

✔ Download KLWP RS-NEUMORPHIS-3 theme for KLWP and KLWP PRO app.
✔ Open your KLWP app, choose the menu icon on the top left, then load the preset.
✔ Find and tap the SPINNING MOON theme for KLWP.
✔ Press the "SAVE" button in the upper right corner.

Instructions:

In Nova launcher settings you need:
✔ select 3 screen
✔ hide status bar and dock

In the KLWP configuration you need:
✔ select 3 screen

Contains:
✔️ Music Player
✔️ News
✔️Time
✔️Dark Mode
✔️ Different colors

Please contact me with any questions / issues before leaving a negative rating on the topic RS-NEUMORPHIS-3 for KLWP.