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 The Pro Gun and Guns App Builder Club:
Robot Builder - All kinds of custom robots to play with! Robot Builder is now available! Everyone loves to build robots! Now you can enjoy Robot Builder on your iPhone and iPod Touch! A fun app full of all kinds of custom robots! Awesome robots with great visuals and effects! Our app provides a full experience of robots. You can choose your type of robot and then watch it come to life on your iPhone. Hear it's sounds and watch it move on your screen! The robots can fly, walk, shoot, and much more!Features: All kinds of fun and cool robots! Move your device to actually move and control your robot. Press your robot to see him come to life. Photo-realistic visuals Realistic robot soundsDownload Robot Builder!