Enter the price, the down payment and the number of instalments.
The amount may not divide evenly by the number of months. Rather than rounding every instalment and losing the difference, the last one carries it, so the total stays exact.
Flat, on the financed amount — the usual practice in shop instalment sales. The tool does not compute compound interest.
Yes — Card Instalments for Windows manages contracts, schedules, collections and arrears on the same rule.