This is not a stand alone app. Theme require Kustom Live Wallpaper Maker PRO application ( not free version of this app). Simple Walls for KLWP contains pack of six very nice and simple themes.
What you need:
✔ Kustom (KLWP) PRO
✔ Compatible launcher that supported by KLWP (Nova launcher is recommended)
How to install:
✔ Download Simple Walls Theme pack and KLWP PRO application
✔ Open your KLWP app, choose menu icon on top left, then load preset
✔ Find and tap on the Simple Walls
✔ Hit "SAVE" button on the top right
Instructions:
In the Nova launcher settings you need:
✔ select 1 screen
✔ hide dock
✔ hide status
In the KLWP settings you need:
✔ select 1 screens
Please contact me with any questions/issues before leaving a negative rating.