I downloaded this app yesterday. Figured for a $1, what the heck.
I am loving it!
KOI Pond is a virtual KOI Pond. You can run your fingers through the virtual water, move the lilies around, feed the fish, change the nature sounds to a few different effects, apply different water colors and set up a whole daytime/nighttime look and feel to it.
It's beautifully done with great real life sound effects. My whole family loves playing with it. Break down and spend the $1 for it. You will enjoy it.