Astro is an educational and reference app developed by SpeedyMarks, available for free on Android. With the help of Google Sky, Astro allows users to explore the night sky, Mars, and the moon. The app provides a user-friendly interface that allows users to pan around quickly and zoom in to examine craters, spots, or nebulas in more detail.

One of the most impressive features of Astro is its ability to display detailed information about each celestial object. Users can learn about the distance, size, magnitude, and other characteristics of each star, constellation, and planet. The app also offers a search function that allows users to find specific objects quickly.

Astro is an ad-supported freeware, which means users may encounter occasional ads while using the app. However, the ads are unobtrusive and do not interfere with the user experience. Overall, Astro is an excellent educational app for anyone interested in astronomy and stargazing.