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.
Do you like Math? Well even if you don't see how you match up against your friends. With Mathlete you can compete in a Math Quiz with people around the world. Using Game Center you can play your friends or be auto matched to player others. You can select you difficulty to start at beginner up to expert. If you can add 2 + 2 you too can be a Mathlete.