Live Day Night is a free Android app developed by Alok Mandavgane that allows you to set a live wallpaper on your device. The wallpaper shows the extent of day and night, which changes in real-time, right on your screen. Additionally, it is available as an image that can be zoomed in.

One of the most notable features of Live Day Night is the ability to set custom dates and times. The app also displays Julian Date, Solar Right Ascension, Declination, Longitude, and Radius Vector. The wallpaper's image is courtesy of NASA. The app is listed under the Personalization category in the Google Play Store.

Overall, Live Day Night is a unique and informative wallpaper option for Android users interested in personalization. Its real-time display of the extent of day and night is a standout feature that sets it apart from other wallpaper apps.