Comment by mikkergp

I've thought about writing something like this. Right now I use a spreadsheet. The "killer feature" I've been looking for is the ability to compare things. Like, if I paid an extra $100 a month, how much faster would I pay off the loan and how much money would I save in interest. Also maybe different repayment strategies. Like one where your payments get gradually lower every month and one where they get gradually higher every month.