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.
This is a simple application to let you keep track of how money someone owes you or you owe them. This was created for my kids who constantly get money that mom and dad 'hold on to' and then try to remember the ongoing balance as they use some of the money. Now the kids can track the balance themselves. They either add money or subtract and the balance is updated.