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.
A free version of the quick and simple app for calculating how much drywall will be needed for your projects. You also have the ability to add a ceiling or exclude large areas such as windows. This free version only supports 4x8 panel sizes.