Mortgage, etc. and car loans, apps that can easily calculate the monthly payments. Borrowings, bonus payments (twice a year), interest rate (year), if you enter repayment number of times, repayments automatically monthly, bonus month repayments, us to calculate one-year repayment, the repayment total. Repayment number of times can be set up to 12 times (one year) to 600 times (50 years). Or try to simulate the repayments before you little major purchase, it is helpful when reviewing the loans are having now.