A lock screen app has particle effect, exactly the same as S5. Also you can set camera shortcut to access camera easily, setup your personal text, add application shortcuts. PS: 1. Click settings icon on right of tool bar to enter theme settings. 2. Launch X Locker, you can change wallpaper, setup security lock, and more. This is a theme of X Locker, need install X Locker to run this theme.</br></br></br></br></br></br></br></br>