The BA II Plus Professional is a complete reimplementation of the full functionality of the TI's professional version of BA II Plus calculator. This free version provides basic Calculator functions, Math functions, Memory functions. A one-time In-App-Purchase required to access the Time-Value-of-Money (TVM), Amortization, Cash Flow, Bond, Depreciation, Statistics, Percent Change/Compound Interest, Interest Conversion, Date, Profit Margin, and Breakeven worksheets.