How a session works
Nilfold is a debt payoff estimate kept on this phone. You type each balance, the yearly interest rate, and the minimum payment. Nilfold builds a month-by-month table from those numbers. It does not connect to a bank, and it does not move money.
Two debts are free, including the month-by-month estimate. A one-time purchase on Google Play raises the limit to eight debts and adds CSV export. There is no subscription and there are no ads. The buy button shows the price Google Play returns. Restore purchase asks Play whether this account already owns the unlock.
You can order the debts three ways. Smallest balance first puts the lowest remaining balance at the front. Highest rate first puts the highest yearly rate at the front. Manual order keeps the order you set with up and down controls. The order is fixed when the estimate starts.
Each month, interest is the balance times the yearly rate divided by 12, rounded to the nearest cent. The first debt that still has a balance also receives the extra amount you set. Other debts receive only their minimum, and a payment is never larger than the balance plus that month's interest. When a debt reaches zero, its minimum is added to the extra amount for the debts that remain. The first month is next calendar month. The table stops after 360 months. If a balance would remain, Nilfold says it is not paid off within 30 years. If a payment does not cover the interest, the balance is marked as growing.