WP 34s is a highly advanced and comprehensive implementation of a classic Reverse Polish Notation (RPN) scientific calculator. Originally available on other platforms, it is now also accessible on iOS devices. With an extensive function set, the WP 34s is based on the most powerful programmable RPN calculators built to date, and includes additional features such as programmer functions, fraction mode, probability distributions, and a stopwatch.

The WP 34s boasts an impressive array of functions for various disciplines including mathematics, statistics, physics, engineering, programming, and more. Users can benefit from functions like Euler’s Beta and Riemann’s Zeta functions, Bernoulli and Fibonacci numbers, Lambert’s W, error function, orthogonal polynomials, and statistical distributions. The calculator also offers programmable sums and products, solving quadratic equations, primality testing, and integer computing in multiple bases.

Furthermore, the WP 34s provides extended date and time operations, financial calculations, unit conversions, physical constants, and support for Greek and extended Latin letters. It includes a beginner's manual for those new to RPN calculators, as well as a comprehensive version for more advanced users.

For those seeking a powerful and versatile scientific calculator on their iOS device, WP 34s is an excellent choice.