Google Sky Map - The majority of mobile devices determine your location based on GPS navigation, that is, they can display a map of the sky, which is above you. But the system does not google Sky Map ostanavilas on this one - based phones have the potential to google Android compass, and also have other sensors that can detect which way you look. Thus, if your android phone has a compass, accelerometer, which allows to determine the position using GPS and time by hours, enough of all this we may know in which direction you look, the result is a completely new look to the sky

Android Yandex Maps - Yandex charts for Android.