Advanced Calculator: A Comprehensive RPN Calculator for Android

The Advanced Calculator is an RPN calculator for Android 9.0 developed by N. G. Tech. It is a powerful calculator that comprises a stack of four registers and ten storage registers along with a last-X-register that holds the previous value of the X-register. The calculator provides basic arithmetic functions, stack manipulation functions, and storage register manipulation functions. It also includes a standard tab with trigonometric, hyperbolic, logarithmic, exponential, and probability functions, among others. The special functions are grouped under a separate tab, and several physical constants are grouped under a separate tab. The calculator comes with a comprehensive help file that explains the use of the different functions.