The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
From NICTA Ltd:
Compare the performance of your cellular network operator with other networks in your country, and at specific locations (coming soon). - Estimate your network's true upload/download rates, and ping time- Troubleshoot your network, or check the speed advertised by your operator- Track and visualize the evolution of your network performance over time- Compare the performance of your operator with other users in your country and around you - Works for both cellular or WiFi networks