I've been using Financisto for a bit on my Epic and I like it so far. Haven't had the chance to put it through the ringer. Being slightly paranoid, though, I didn't input any real credit/debit card info into it, though, but I don't have enough cards that I need to have the last 4 digits in there to tell them apart
it is really just a monthly list-calendar of dates app (able to be recurring based on amt of days or day of the month) that shows what bill is due on that date and how much it is.
at the bottom is the "to be paid" total & "paid" total
also, beside each bill, is a checkmark that you can manually press and it will show the bill as paid.
each bill can have a reminder to notify you
it's simple--but really all that i need. no security worries since it doesn't ask for your bank account info or anything.