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.
Unleash your inner canine by "marking your territory" wherever you go. With Mark It!, you can leave behind various "markers" (messages) for friends and others to find when they are nearby. In addition, your markers can be posted on your Facebook wall. You can also take a picture, send a photo or add a comment on your Mark with Twitter, Facebook or email. It's quick, easy, and free!