Abacus Financial Calculator 2.31
the author of this app says:
Abacus is an RPN financial calculator based on the HP-12C.
If you have used the HP-12C RPN calculator, the familiar key layout and functionality will make Abacus a convenient substitute for the most-used functions.
The Abacus Financial Calculator's features include depreciation, the time value of money, cash flow, amortization, statistics and more!