Star Tracker is described as 'Just hold up and point the device to the sky and have fun! You can see any stars, constellations and deep sky objects you are watching in real time' and is a Star Map in the education & reference category. There are more than 25 alternatives to Star Tracker for a variety of platforms, including iPad, iPhone, Android, Android Tablet and Windows apps. The best Star Tracker alternative is Stellarium, which is both free and Open Source. Other great apps like Star Tracker are Trail Sense, Sky Map, KStars and Gaia Sky.
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.
United States
Welcome to the Atlas of Space — an interactive visualization to explore the planets, moons, asteroids, and other objects in the Solar System.
Can’t see the moon? Want to know where it is? Look through the eyes of your device to see a virtual window into the whole visible universe.
United Kingdom
StarCalc is the fastest professional astronomy planetarium & star mapping program for Windows 9x/ME/NT/2000/XP (StarCalc version for PocketPC is available). It illustrates star positions of any instance of the day observed from any geographic locations on the Earth.
Russia
SkyMap provides interactive sky maps for any time, viewpoint and location on Earth. It shows the different names, coordinates, magnitude, astronomical rise and set times plus additional information for over 110000 stars, messier objects, planets, sun and moon.
SkyORB is more than a simple star map, it's a collection of 7 tools including a 3D star map, 3D planetarium, ephemeris, search engine, sun clock, point to sky, weather, and more.
France
EU
A browser-based virtual planetarium of stars and planets customizable by location (latitude and longitude) and time of day.
United Kingdom
Aciqra (uh-SEE-kruh) is a free and open source virtual sky map and planetarium which tracks and displays astronomical bodies including planets, nebulae and stars to an accuracy of a fraction of a degree for thousands of years into both the future and the past.
SkySafari is a powerful planetarium that fits in your pocket. It puts thousands of stars and planets at your fingertips. It lets you find objects in the sky using your device's built-in compass and accelerometer.
United States
Starmap is an intelligent sky navigation tool, written by a professional of the field.
Switzerland
From an augmented reality view of the night sky, to a virtual visit to the surface of Mars, Pocket Universe is the ultimate in astronomy apps. Moon phases, Orrery, ISS sightings, Jupiter’s moons, Quiz games, Leaderboard achievements, pop-up notifications of important events...
