GoSkyWatch Planetarium is described as 'Displays the sky view at the correct orientation when held at any angle not just landscape or portrait. Simple operation, no buttons to press or modes to select, just point to the sky to start exploring' and is an app in the Education & Reference category. There are more than 25 alternatives to GoSkyWatch Planetarium for a variety of platforms, including iPhone, iPad, Android, Android Tablet and Windows. The best alternative is Stellarium, which is both free and Open Source. Other great apps like GoSkyWatch Planetarium are Sky Map (Free, Open Source), Gaia Sky (Free, Open Source), KStars (Free, Open Source) and Star Walk (series) (Paid).
The Starry Night apps are the most comprehensive educational astronomy apps. Use it with your introductory astronomy textbook or on its own. It's a powerful, portable planetarium that fits in your backpack. It puts thousands of stars and planets at your fingertips.