Thank you Лариса for the idea!

A smoking volcano in a tropical jungle. Leaves are swaying in the wind while clouds move over the sky that shifts color dynamically during the day and night. At dawn the sun rises and moves slowly over the sky until sunset. You can set the sunrise and sunset times to any time you like or just let the app calculate the exact times at your location. As the night falls the moon appears clearer and clearer until fully visible at midnight.

While the free version is beautiful and fully functional, the settings are locked. The full version is highly customizable:

Flickr contrubutors

Plants & Trees: John Menard
Arenal Volcano (Costa Rica): Ardyiii
Moon: Luis Argerich

Thanks for the creative commons licenses!