If you are a stargazer  you're going to love this app. Just download it. That's it. If you love to look up at the night sky  you have to have this app on your phone. It doesn't take up a lot of space  there are no ads  it won't slow down your phone  or interfere with any other apps. There's really no reason for you to not have this on your phone. Oh yeah... plus it's awesome.