Once done, run it and point your phone at any object in the night sky. Move it within the ring and it tells you what that object is. Celestron is charging hundreds of dollars for a similar (but of course better) product! But this one is good enough if you want to identify objects. Do try it out. There is a paid version. Did no check what features it has.
![ahaaah [smilie=ahaaah.gif]](./images/smilies/ahaaah.gif)
https://play.google.com/store/apps/deta ... free&hl=en