Star Tracker - Mobile Sky Map

Identify the sky above you

Star Tracker - Mobile Sky Map turns an Android phone or tablet into a live guide to the night sky. Point the device upward and it places stars, constellations, planets, the Sun, the Moon, and selected deep-sky objects over the view in real time. It is suited to beginners, casual stargazers, families, and anyone who wants a quick way to understand what they are seeing outdoors.

A practical introduction to astronomy

The app covers the 88 constellations and more than 8,000 stars visible to the naked eye, with illustrated views for the zodiac constellations and several notable deep-sky targets. Location can be set automatically through GPS or entered manually, which is useful when planning observations somewhere without a reliable signal. The core sky data works offline, so the app can remain useful away from a network connection.

• Live tracking: motion-based sky mapping responds as you move the device.
• Wide device support: designed for screens ranging from small phones to large tablets.
• AR viewing: menus can be hidden while the sky view fills the screen.
• Extended tools: the paid upgrade adds object search and guidance, a 3D compass, night mode, and controls for changing time and location.

What to know before observing

Orientation accuracy depends on the phone’s sensors. Magnetic covers or metal cases can interfere with the compass, so removing them may improve alignment. Like any phone-based sky map, it works best when the device is held steadily and calibrated when its direction appears off.

Track record

Developed by PYOPYO Studio and listed in Education, Star Tracker has a rating of about 4.54 from 80,358 reviews and more than 10,000,000 installs. Those numbers fit its role: a straightforward reference for recognizing the sky rather than a replacement for a full astronomy course.