This free app is a live wallpaper, which means that it will change its background to a beautiful natural scene as soon as you turn your phone on. The best thing is that it's so easy to use, and you don't need to download any other apps to make this happen. The background will change every time you unlock your phone, so you can use it as a nice way to display your current time and date.

Aurora is a term that refers to the Earth's aurora borealis, which is an incredibly beautiful and colorful phenomenon that can be seen in the sky. It's caused by charged particles from the sun hitting the Earth's atmosphere and lighting up the Earth's surface.