Touch Fin Black-Scholes app for iPhone and iPad

Touch Fin Black-Scholes Edition is an RPN financial calculator. This app implements many features of the industry-standard HP-12C, and replaces some seldom-use financial operations by Black-Scholes and option functions.

The interface is the cleanest possible: just the calculator filling the whole screen.

Features:

* Quick guide (touch right upper corner to show)
* Audible feedback (touch ON to open Settings)
* Save memory to iCloud
* Vertical layout. Orientation can change with phones rotation or stay fixed.
* Copy to clipboard (touch left upper corner to copy)
* American, European and Indian decimal separators (touch ON to open Settings)
* Visual feedback for typing
* Black-Scholes: value of call and put, greeks (delta, gamma, rho, theta, vega), implied volatility, N(x) and N(x), d1, d2, number of business days between two dates.

Usually Touch Fin Black-Scholes iOS app used & searched for