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 Ziyad Al-Salloum:
Towards hassle-free commuting, Makaney Code a great idea to easily identify places anywhere on earth. The code is a human-friendly alphanumeric representation (like postal or zip codes) of the geographic latitude and longitude coordinates. Using Makaney code helps easily identify places on earth with an easy to remember code. That's becomes very useful especially in countries that do not implement a practical postal code system. In such countries people tend to describe their locations using directions, which is not always straightforward, waste valuable time, and results in many inconveniences especially when an ambulance needs to reach a certain location as soon as possible.