15C Pro Scientific Calculator vs Plus42

15C scientific calculator is a high-end scientific programmable calculator for iPhone and iPod touch, which behaves exactly like, and supports all functions of HP 15C Scientific Calculator. "15C Scientific Calculator supports complex numbers, intense calculations, matrix operations, and many other features that I don't have room to list. " -- AppGratis.com "This is a terrific emulation of the venerable HP-15C calculator -- the best one I've found in the App Store (and believe me, I've tried the others). Works just like the original, and it comes with a wealth of help functions -- pressing the Help button reveals the original User Manual and Advanced Functions Handbook in PDF format, as well as manuals for a number of other HP calculators. And it's always as close as your phone. " -- from app store review "Does exactly what my HP15C does, and always with me in my pocket" -- David, Financial Analyst. Built with identical mathematics and algorithms, it gives you same capabilities and better performance. It can perform numerical integration and solve the roots of equations in addition to supporting complex numbers and matrix calculations. **** Features **** • Root finder • Numeric integration • Complex numbers • Matrix operations • Hyperbolic and inverse hyperbolic trig functions • Probability (combinations and permutations) • Factorial, % change, and absolute value • Random number generator • RPN entry • Programmable • Option to disable/enable key click feedback sound • Automatically save/restore settings during app close/start • Click menu key to see more options. • More ... **** Support **** Feel free to contact us if you need any support by visiting www.vicinno.com or simply email us at support@vicinno.com. **** Stay tuned **** Like us: www.facebook.com/vicinno Follow us: www.twitter.com/vicinno

Plus42 is an advanced scientific programmable calculator, based on Free42. Free42, in turn, is a complete re-implementation of the HP-42S scientific programmable RPN calculator, which was made from 1988 until 1995 by Hewlett-Packard. Free42 is a complete rewrite and contains no HP code whatsoever. Plus42 builds on Free42 and adds: Algebraic expressions modeled after those used on the HP-27S and HP-17B/19B; attached units and unit conversions modeled after those used on the HP-48/49/50 series; directories for more organized storage of programs and variables; a larger display, with 8 rows and 22 columns (131x64 pixels) by default, which the user may resize at will; time value of money and amortization schedules; and two-dimensional plotting of functions, with ability to zoom and pan, and find integrals and roots from points in the plot.