Planisphere is described as 'Astronomy application that lets you use pinch and finger gestures to manipulate a map of the sky. As you zoom in finer detail comes into view. You can double tap on objects to get more information' and is a Star Map in the education & reference category. There are more than 25 alternatives to Planisphere for a variety of platforms, including iPhone, iPad, Android, Android Tablet and Windows apps. The best Planisphere alternative is Stellarium, which is both free and Open Source. Other great apps like Planisphere are Sky Map, KStars, Gaia Sky and Sky Guide.