A webapp that helps you pay off credit cards before incurring interest by providing configurable reminders. I find credit card reminders and statements can often be difficult to interpret, and if you have multiple cards you will likely receive notifications in multiple ways. This webapp will aim to provide you with a snapshot of what you will have to pay and when, and provide clear, configurable payment notifications.
So... who is your customer? The card holder? The issuing institution? How much would YOU pay for this, and how likely would YOU be to give a reminder app banking access?
I'm not saying this isn't worthwhile, but as described, it's not that appealing.