A free app for Android, by RumaTech Inc..
A windmill is a machine that uses the wind to generate electricity. It is the most simple and effective way to obtain clean, renewable energy. A windmill consists of a rotating mechanism with four or more blades, which transform the wind into a rotating motion that drives a wheel or another mechanism to produce a useful product or perform a mechanical operation.
Windmills have been around for centuries, and their technology has been improved and adapted to suit different needs and requirements over the years. Today, windmills are used to convert wind energy into electricity, for use on a utility grid.
This app is perfect for your home screen or lock screen as it provides beautiful wallpapers with a nice sound.