Every other debt calculator starts from minimum payments and works forward. It shows you a payoff date years away, assumes you keep paying the same amount forever, and gives you nothing to act on.
FreeByDate starts from your discipline. It takes your full available surplus each month and directs it entirely at one debt until that debt is gone. When it closes, that freed payment stacks into the next one. The speed compounds every time you win.
Your savings are protected from the start. Your fixed bills are accounted for. What remains is your payoff weapon, and FreeByDate shows you exactly what it can do.