This is not a stand alone app. Theme require Kustom Live Wallpaper Maker PRO application ( not free version of this app) What you need: ✔ Kustom (KLWP) PRO ✔ Compatible launcher that supported by KLWP (Nova launcher is recommended) How to install: ✔ Download Slide Card Theme and KLWP PRO application ✔ Open your KLWP app, choose menu icon on top left, then load preset ✔ Find and tap on the Slide Card Theme ✔ Hit "SAVE" button on the top right Instructions: In the Nova launcher settings you need: ✔ select 4 screen ✔ hide dock ✔ hide status bar In the KLWP settings you need: ✔ select 4 screens Please contact me with any questions/issues before leaving a negative rating.