This is not a stand alone app. Theme requires Kustom Live Wallpaper Maker PRO application (not free version of this app).
Stripes KLWP theme supports 18:9, 18.5:9, 19:9, 19.5:9 screen ratios.

What you need:
✔ Kustom (KLWP) PRO
✔ Compatible launcher that supported by KLWP (Nova launcher is recommended)

How to install:

✔ Download Stripes KLWP theme and KLWP PRO application
✔ Open your KLWP app, choose menu icon on top left, then load preset
✔ Find and tap on the Stripes KLWP theme
✔ Hit "SAVE" button on the top right

Instructions:

In the Nova launcher settings you need:
✔ select 1 screen
✔ hide status bar and dock

In the KLWP settings you need:
✔ select 1 screen

Please contact me with any questions/issues before leaving a negative rating about Stripes KLWP theme.