I was happy I purchased this app. The clouds move by, the grass moves in the wind, and you can hear the sound of crickets and water. Theres also gentle tones that occasionally plays in the background. I wouldnt say its music necessarily, just some nice tones that you hear now and then. It is nice to have playing and if I hook this up to my sound system, it would provide a very comfortable and relaxing backdrop of sounds. I wouldnt even have to look at the visual part and I would be happy with my 99 cent purchase.
When you knock on the screen or clap (or make some noise) the fireflies disappear.
Not much else happens, and dont expect anything to change when you turn the iPhone to the horizontal position. Still, its a great app.
Glenn Kramer about HOTARU