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.
iWore it Before is an app to help you recall what you wore on a certain date, at a certain event, or with a certain person. It allows you to take pictures of each component of an outfit (including accessories) and save it in your gallery as a wardrobe file. You can then search for that wardrobe any time you want to make sure you don't wear the same wardrobe over and over again. It's easy to use and very effective.