DoughnutPay Card Organizer в Android Market

DoughnutPay Card Organizer (v. 1.0) Разработано Zobo

Your credit cards can be interest free loans, and this app helps you do it!  There is something called a grace period which is the amount of time between when you buy something, and when you actually have to pay for it on the bill.  If you maximize that, you will be able to buy things and pay for them up to 60 days later.