Double Rainbow Guy Now Trying to Cash In with iPhone App [VIDEO]

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When you load the app [iTunes link], you're greeted with a colorful message that simply says, "FULL ON." The next screen is the only screen in the app: It's just like the default camera app for the iPhone, but it puts a transparent double rainbow "all the way across the sky" in every image.

You can tap a chat bubble icon to accompany your photo with the audio from the famous viral YouTube video. It's simple, and frankly not that great, but it might amuse you for a few minutes, and that's what $1 iPhone apps are all about, right?

Double Rainbow Guy is hosting a contest in which he'll give a free shirt to the fan who sends him the best rainbow picture made with the app. Between this and the Windows Live Photo Gallery ad, he's clearly cashing in on his 15 minutes of Internet fame.

Here's a video demoing the new app and announcing the contest.