A value-added, comination calculator, SciStatCalc combines the functionality of a dual calculator for scientific equations and statistical functions.
iPhone and iPad apps tagged "scientific calculator."
Study Mathematics with PocketCAS 3.1 - Update Plus 75 Percent Discount
EUROCOMP has announced the release of version 3.1 of its award winning mathematics software PocketCAS for iPad, iPhone and iPod touch. Version 3.1 adds several new features like improvements for presenting results as well as compatibility with iOS 6 and the iPhone 5.
SpaceTime Super Calculator for Advanced Math Functions
SpaceTime. A graphing and scientific calculator built on an advanced mathematics engine. It's not the kind of thing you need every day, but it is the kind of specialized calculator that you expect to pay dearly for when you do need it.