London Day Night is an Android wallpaper application developed by apps on air that gives your device a cosmopolitan look. It features a skyline view of London that changes from day to night based on the local sunrise and sunset times. The wallpaper is available in 4K resolution (4096x2048), ensuring perfect image quality on all devices in both portrait and landscape mode.

The application has several features, including new view modes such as static, auto move, and gyro motion. It also provides daydream mode support, an open GL based engine, and sunrise/sunset based on the actual position. Moreover, the application allows users to manually set the time of sunrise and sunset based on the time of London.