This is not a stand alone app. Theme requires Kustom Live Wallpaper Maker PRO application What you need: Kustom (KLWP) PRO That Compatible supported by KLWP launcher (Nova launcher is recommended) How to install: Download Didactic System UI for KLWP KLWP Open your app, choose menu icon on top left, then a preset load Find and tap on the Didactic System UI Theme for KLWP Hit "SAVE" button on the top right Instructions: In the settings you need Nova Launcher: select one screen Set wallpaper scrolling hide status bar and dock Please contact me with any questions / issues before leaving a negative rating.