Two years ago I posted a blog called "The Last Fishing App You'll Ever Need." That app was called Fishfinder. You took a picture of a body of water, your phone appeared to be making calculations, and then it spit back a sonar image that showed the location of the fish. Of course, it was just a joke...although a few commenters weren't so sure at the time. How funny is it that two years later, the real thing exists? I haven't tried Deeper yet, but it looks pretty legit. At least it has to be better than the castable fishfinder that displayed on a bulky wristwatch Humminbird came out with about 17 years ago. I got one for Christmas when I was a kid and it never worked worth a lick.