The Loan Payoff Calculator App will show the payoff of your loan as it is currently being paid. It will also allow you to add additional principal payments to see how that affects the payoff date and remaining interest to be paid.
It is a lightweight, easy-to-use app that does not ask for any personal information. The numbers needed for the calculation are: remaining balance of loan, monthly principal payment, monthly interest payment and monthly escrow payment if you are calculating a mortgage or property loan.