ShowSky vs Solar Coaster

ShowSky is an astronomy app for everyone. It is designed to let you easily understand and learn the sky in front of you. It gives you a complete view including stars, constellations and deep space objets including photos. The 180 deg map shows you the whole sky in front of you with a flat horizon just as you see it. The 360 deg map shows you the whole visible sky at this moment and the "track" view allows you to point your device towards the sky and see in details what is there. Just turn around to see all currently visible constellation and objects. ShowSky's maps shows you not one or a small number of constellations, but the whole sky allowing you to understand their relative positions in the sky. Planet are also included.

Solar Coaster provides accurate position, time, motion and eclipse information for Earth's nearest star, Sol, our Sun, and nearest celestial body, Luna, our Moon. Information includes 3D movement graphs, upcoming eclipses and their circumstances, rise and set times, positions, distances and velocities, moon phase, illumination and crescent rotation. Solar Coaster automatically updates its state every minute, or you can examine minutes randomly. The simulation uses a local horizontal coordinate system when displaying information, which essentially means that your current position is the center of the Universe and all calculated values are relative to you. Sun and Moon positions are also available in equatorial coordinates. Solar Coaster stores enough onboard astronomical data to keep it running through the year 2100 AD, which means that all calculations can be performed locally without the need of a network connection — useful while in the wild chasing an eclipse. Algorithms are accurate at all longitudes, and latitudes between -61° south and +60° north (roughly speaking, locations outside the Polar regions). Of course, you must have Location Services enabled and allow Solar Coaster to access your position for accurate simulation results, and to properly detect eclipses visible at your location. You can also allow Notification Center to keep you informed when those eclipses will occur. Solar Coaster comes in various flavors: for iOS a native App; and for macOS a native App, Screen Saver and Web App.