What are some alternatives?
When comparing Sky Map of Constellations and Google Sky Map, you can also consider the following products
NASA App - Showcases a huge collection of the latest NASA content
Star Chart - Stellarium is a planetarium software that shows exactly what you see when you look up at the stars. It's easy to use, and free. Read more about Star Chart.
Sky Map - Sky Map (formerly the Google Sky Map) turns your Android-powered mobile phone into a window on the...
SkySafari - SkySafari is a powerful planetarium that fits in your pocket.
Stellarium - Stellarium is a free open source planetarium for your computer.
Gaia Sky - 3D visualization software for ESA's (European Space Agency) Gaia mission to chart about 1...