Earth Light app for iPhone and iPad

Earth Light is a real-time visualization of the areas of daylight and darkness across the earth. The map can be zoomed for a detailed view, and various overlays (latitude/longitude grid, sun and moon location, etc.) can be applied. An interactive mode allows you to adjust the time and date to see how the seasons affect the amount of daylight throughout the year.

Features:
- Real-time display of areas of daylight/nighttime on the Earth
- Detailed, zoomable Earth map with nighttime lights overlay
- Terminator line shows sunrise/sunset line
- Gradual transition to darkness, matching real conditions
- Interactive Mode allowing you to set the time and date to see how the seasons affect the amount of day and night at any location.
- Map overlays, displaying:
- latitude/longitude grid
- Sun location (where the sun is directly overhead)
- Moon location (where the moon is directly overhead)
- Simulated cloud cover (real-time clouds may come in future releases)
- Country outlines