Please answer the following question: Given this review: "Best app! This app gave me the names and locations of the constellations relative to my own back yard in real time. After using it for 1 week I was able to recognize many constellations and individual stars easily which I never was able to do after reviewing books or star charts. I found myself going out multiple times a night to see the constellations coming up from the horizon. Wish I had this back in school as a kid!" Would you recommend this app to a friend? Not at all, No, Maybe, Yes, or Definitely?
A:
Definitely