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 Cosmin Cremarenco:
This free app allows you to better plan and preview the monthly payments on your loan/mortgage.Use this calculator to determine the monthly payments for any fixed-rate loan.CreditPlan also allows you to calculate an amortization schedule: how much interest and how much principal will you be paying each month. Make informed decisions: notice how much more interest you pay in the beginning than at the end of the loan.The amortization schedule generates a graph that shows the interest share into the whole loan re-payment. The longer the loan duration the higher the total interest amount.