allRPNCalc Calculator

allRPNCalc Calculator

By Ernest Brock

  • Category: Finance
  • Release Date: 2008-09-12
  • Current Version: 4.2
  • Adult Rating: 4+
  • File Size: 1.79 MB
  • Developer: Ernest Brock
  • Compatibility: Requires iOS 11.0 or later.
Score: 4
From 161 Ratings


allRPNCalc is a versatile calculator that uses the powerful Reverse Polish Notation logic system combined with an automated 4 level stack to compute answers to complex mathematical problems. The keyboard layout and display have been optimized for use on an iPhone,iPod Touch and iPad. Large keys with sound feed back give you typing confidence and the last function keyed is always displayed. Functions are logically laid out to eliminate multiple key entry for most problems. Display: Results are displayed in fixed, fraction, scientific or engineering notation with from 0 to 14 significant digits displayed. In programmer’s mode hex, decimal, octal or binary (with windowing) can be displayed. Calculations are carried out in industry standard IEEE double format with 14+ significant digits and exponents ranging +/-308. Math: +, -, ×, ÷, ln, log, e^x, 10^x, y^x, x², x³, 1/x, √x, ∛x, fraction part, integer part, absolute value, random, seed, mod Trigonometry: sin, cos, tan, asin, acos, atan, sinh, cosh, tanh, asinh, acosh, atanh, to radians, to degrees, to rectangular, to polar, to hours, to hours minutes seconds, hours minutes seconds add and subtract, triangle solver, π, π/2. Trig functions can be computed in radians, degrees or gradians. Statistics: sum plus, sum minus, mean, weighted mean, standard deviation, population standard deviation, linear estimate x, y and correlation coefficient, combination, permutation, factorial (gamma), percent, delta percent, percent of total Programer’s functions: and, or, xor, not, shift left, shift right, rotate left, rotate right, word sizes 8, 16, 32, 48 Conversions: 47 world currencies and over 100 commonly used metric, english and other conversion factors used in scientific, engineering and financial calculations. Financial: time value of money calculations, n, i, pv, pmt, fv, depreciation (straight line, sum-of-years, declining balance), bond price and yield to maturity, amortization, net present value, internal rate of return, up to 80 cash flows, days between dates, date plus days, rounding. Storage: 4 level automatic stack with lastX, exchange and roll down, 20 general purpose storage registers, register arithmetic +,-,×,÷ , 6 dedicated registers for statistics, 80 cash flow entries, 5 financial registers.



  • allRPNCalc - the best

    By MP35217
    I have bought very few apps for my phone. The purchase of allRPNCalc is the exception. I spent a few dollars on this several years ago and it is the best use of money for an accessory ever. A powerful RPN calculator, that does everything I need and more. It is regularly updated to keep it in sync with all the updates iOS undergoes. I highly recommend this app to anyone that needs an RPN calculator. You will not find better.
  • User

    By DonHM
    My favorite of several RPN calculator apps.
  • Great RPN calculator

    By J. A. Young
    I use it all the time!
  • Great RPN calculator!

    By The Meerkat
    I used to work for the HP calculator division that pioneered RPN. Trust me. This is beyond a full featured RPN machine. Well thought out. Great job! Each version is even better than last. Now at v4.1. Very happy customer.
  • Excellent

    By SaidWhatToo
    Been using for years. All the functionality plus more. Never a crash.
  • Great RPN Calc!

    By Sean702
    Calculations are spot-on and this developer has been kind enough to provide free updates for many years now... Which makes it well worth buying. I've tried others and I still like this one the best. Very easy to use yet it has the depth and breadth you'd expect. I use it frequently for mortgage calculations and amortizations.
  • Great program!

    By Comsguy
    This is a great RPN app! It works very well and the developer support is exemplary! I had an issue with iOS 11 update and the response to my inquiry was swift and simple. Way more than I’d expected for a $6.00 application. Others should emulate this fine example! Well done Mr. Brock, thank you.
  • Great rpn calculator

    By MRR714
    Couldn’t do without it
  • RPN Rules

    By Xetdog
    RPN rules and this is the calculator to do the job
  • Had it since the original. Use it. Love it.

    By Big2thumbs
    This has been one of my most used apps over the years. It's had very few if any updates - because it hasn't needed them, until this latest OS release. I was sad to see a notification that this RPN calc wouldn't work anymore. I'm now happy that this new updated version came out. My only suggestions are to make the stack longer and to add 'mils' in the conversions.