CalculatorFin turns your phone into a financial calculator. It has functions to calculate present value, future value, payment, frequency, interest rate (of ordinary annuity, annuity due, or one-time payment), effective annual interest rate, number powering, and last calculation result. User can use pairs of parentheses to designate calculation priorities. Input formula and result are displayed. User can undo part of the formula and add new one, or use the last result for new calculation.
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