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 row27 Mobile:
With the Wild Rewards app you can: - See upcoming events that you can attend for points - Check-in to events & earn additional points - Connect to various social media accounts to earn points - See your point total and browse the prize store - Explore all the ways you can earn points - Manage your rewards account