Costy app for iPhone and iPad

Calculate how much interest you will pay with your purchase, with the ability to slide days so you can find out exactly how much you will pay per day, or per month.

The calculator does not require you to to enter complex financial data, and works on the daily compounding method. This is also the method most lenders for consumer debt use.

If a payment is made, you can calculate interest from the beginning of your statement date to the payment date, and then calculate new interest after the payment date.

Always read your statement to see how your lender calculates interest.