The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
From more than logic:
This app is a playful way to decorate images of your friends. Using state-of-the-art face detection, we are able to analyze the face and add fun blemishes and shiners to any photograph from your camera or photo album. It's as easy as taking a picture. Just make sure that your subject is facing the camera directly, wait for our computational magic and then add the desired amount of blemishes and black-eyes to your picture. You can even take a group picture! Once you save them to your phone, you can send them to your friends with or without our customized watermark.Herps and Purps is a digital caricature application and should be used for the sole purpose of parody. The application is meant to provide private entertainment only. The creators shall not be associated with the distribution and publishing of the images created with the application. Any media created with Herps and Purps shall not be construed as factual. Herps and Purps is intended for mature audiences, and should not be used by persons under 18 years of age. All users are responsible for the content of their own material in respect to, but not limited to: copyright, trademark, libel and defamation. In no event shall the creators, their associates or affiliated members be liable in contract, tort, or otherwise for any damages resulting from any claim or cause of action relating to Herps and Purps.