# Description

My RPN calculator is a scientific and financial calculator inspired by the Hewlett-Packard HP-10C series pocket calculators of the 80s, most notably the HP 11C and HP 15C models.

These software version has borrowed the RPN (Reverse Polish Notation) and the look&feel of those calculators. It features classical 4 operations, logarithms, trigonometry, statistics, and macros for easy programming. It also features complete support for complex numbers along with 2nd, 3rd, and 4th degree equations solving.

Its unique magenta L key allows switching from one layout to another, thus saving space on small displays like smartphones without compromising usability.

Support for gestures allows switching from one keyboard to another by swiping left or right, and a light swipe up or down on a key executes the associated f or g function, without any need to actually press the f or g key.

See the web pages of the application at http://calc.lsrodier.net for complete keys description and samples.

My RPN calculator is compatible with all devices running Android 2.1 and up and supports both horizontal and vertical orientations. It does however requires a device with a minimum screen resolution of 320x480 (or 480x320 according to orientation). Note that tablet screens 1280x800 are properly managed.

Summary of the main functions:

* RPN input

* Portrait/landscape and multi-resolution layouts

* Gesture support for extended/simplified inputs

* Arithmetic functions (+, -, x, /, 1/x, +/-, etc)

* Trigonometry, logarithms, hyperbolic trigonometry

* Percentages (+, -, variation, total)

* Dates

* Complete complex numbers support

* 2nd, 3rd, and 4th grade equations solving

* Unit conversions (temperatures, distances, etc)

* Macros for simple programming tasks

Summary of the main statistical functions:

* 1- and 2-variable statistics

* Sums (Σx, Σx2, Σy, Σy2, Σxy)

* Mean, weighted mean, standard deviation

* Linear regression

* Correlation coefficient

* Linear estimation

* Statistical registers table

You must install this app before submitting a review.

Google Play reviews now use Google+ so it's easier to see opinions from people you care about. New reviews will be publicly linked to your Google+ profile. Your name on previous reviews now appears as "A Google User".

Write a review

My review

Review from

# Reviews

Helpfulness

Newest

Rating

Helpfulness

All Versions

All Versions

Latest Version

3.8

5 total

5 2

4 2

3 0

2 0

1 1

Harold Reed

I was looking for a I was looking for a replacement for my hp10c. The 15c doesn't have the same features, but this app does an excellent job of emulating it. Worth the price.

A Google User

Big recommendation Fabulous! Costs less than new batteries for my HP 32SII and works a treat. Junking my old calculator now!

User reviews

# What's New

Named macros RCL-EEX and STO-EEX support

New layouts (1024x600, Galaxy Nexus, ...)

New i key for direct complex numbers input

Gestures support (swipe and long tap)

Memory registers on Search key

Conversions between values (menu and option)

'Duplicate on ENTER' option

Constants (menu and option)

Display format of the numbers option

Macros for easy programming

Complete statistics functions

Date operations

# Additional information

Updated

June 26, 2012

Size

2.5M

Installs

500 - 1,000

Current Version

1.44

Requires Android

2.1 and up

Content Rating

Everyone

Permissions

Report

Flag as inappropriate Offered By

Laurent Rodier

Developer

Visit Website Email lsrodier@gmail.com

Laurent Rodier
Via Venezia 18
20054 Nova Milanese (MI)
Italia

# Similar

## 15C Scientific Calculator

As a powerful emulator of HP 15C Scientific Calculator, Vicinno 15C Scientific Calculator provides all functions of the world-renowned HP 15C RPN high-end scientific programmable calculator for Android. It uses the identical mathematics and calculations with the original to give you the same precision and accuracy.

It can perform numerical integration and solve the roots of equations in addition to supporting complex numbers and matrix calculations.

**** Cool Tip: click the upper right logo to see the settings page for more options. ****

**** Please be noted: the f (i) in our app works a little differently from the real calculator: instead of hold and release, just click the f (i), the display will show the imaginary part for a second, then switch to real part automatically. *****

★ Features include:

• 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

• enable/disable key click sound

• Comma as decimal point option

• Automatically save/restore settings

• Touch logo to see all settings

• Direct access to support forum from app

• Support Android Tablet

• More

★ Support:

Feel free to contact us at support@vicinno.com.

★ Stay tuned:

Like us: www.facebook.com/vicinno

Follow us: www.twitter.com/vicinno

## NeoCal Advanced Calculator

NeoCal is an advanced, award-winning calculator designed to work just like a real calculator, only better. The intuitive keyboard design provides efficient access to over 230 financial, statistical, scientific, programmer, conversion, and date and time functions without having to access menus or lists of functions. The large 12-digit display includes thousands separators and shows labels for calculated and stored results. Backspace, Undo, and Redo make correcting mistakes simple.

NeoCal is highly customizable to work the way you do. Enable the Precedence option to reduce entering parenthesis, or enable the RPN option to eliminate them completely. Enable up to four display lines to see current and previous results. Choose your own theme for improved readability.

NeoCal is a mature product that has been on the market for eleven years. It has been continually enhanced by suggestions from the user community, making it an even more effective and user-friendly tool. An extensive user guide containing many examples is included in the application.

SUMMARY OF BUILT-IN FUNCTIONS

- Scientific: trigonometric, hyperbolic, and logarithmic functions; degrees/radians conversions; time and angle conversions; physical constants

- Financial: time value of money, amortization; discounted cash flow analysis for internal rate of return and net present value; interest conversion between nominal and effective rates; margin and markup calculations

- Statistical: two variable statistical analysis including mean, weighted mean, standard deviation; linear regression forecasting, correlation coefficient; probability calculations

- Date and Time: date arithmetic; duration arithmetic and conversions including frames for digital video editing; moment conversions

- Programmer: base number conversions between binary, octal, decimal, and hexadecimal; 32-bit, 16-bit, and 8-bit signed and unsigned integer math calculations and conversions; logical and bit-manipulation operations

- Conversion: length, area, volume, speed, weight, temperature; unit arithmetic

SUMMARY OF FEATURES

- UI designed specifically for Android phones and tablets

- Unique Dynamic Keyboard technology

- User-selectable themes

- Multiple keyboard layouts

- 12-digit display with thousands separators

- Locale-based number, date, and time formatting

- Labeled results for clarity

- Optional RPN input method

- Selectable RPN stack size

- Up to four display lines

- 20 or 100 user registers

- Multi-level Undo/Redo

- Macro record and playback

- Extensive user guide included in the app

## HP-35 Emulator Calculator.

The HP-35 was the first scientific pocket calculator in the world (with exponential and trigonometric functions). Also used Reverse Polish Notation (RPN), being the first scientific calculator algebraic history.

And now through this emulator for the HP-35, where both perfectly emulates the LED screen of the original 15-digit calculator physically and how we can make use of it in a virtual like you're actually physically in our hands through our Android device.

The HP-35 calculated arithmetic functions, logarithmic and trigonometric functions.

And now through this emulator for the HP-35, where both perfectly emulates the LED screen of the original 15-digit calculator physically and how we can make use of it in a virtual like you're actually physically in our hands through our Android device.

The HP-35 calculated arithmetic functions, logarithmic and trigonometric functions.

Some historical curiosities of this calculator are:

- The display of 15 characters in the HP 35, when the reverse was seen, could produce a limited number of alphabetic messages. For example, 710.77345 would read as "SHELL OIL". The sample was probably more extravagant +40 57738.57734 E would be read as "Oh Hells Bells".

- The HP 35 was just 5.8 inches long and 3.2 inches wide. This was the pocket size of William Hewlett, of there as the "pocket calculator".

- The power requirement of the LED display was responsible for the short life between battery charges the HP 35, about three hours. To prolong the operating time and prevent damage from overuse of the slide switch on / off, users could press the decimal point key to force the display to illuminate only a segment of the LED.

- The HP 35 calculated arithmetic functions, logarithmic, and trigonometric, however, full implementation used only 767 carefully chosen instructions (7670 bits), in what is a marvel of concise programming.

- The introduction of the HP 35 scientific calculators and other similar capacity by Texas Instruments soon signaled the end of the slide rule as a status symbol among science and engineering students. The covers of the rules of calculations were disappearing to make way for the covers of the "electronic slide rule", and universities began to abandon the slide rule classes of their curriculum.

- The HP 35 was the beginning of a family of related calculators all sharing similar mechanical packaging:

- The screen was unique in the sense that multiplexing is designed to illuminate only one LED at a time segment, instead of a single-digit LED, because HP investigations had shown that this method was perceived by the human eye as more Bright energy equivalent.

- The calculator used three NiCd batteries "AA" assembled in a removable battery pack, owner of HP design. Battery packs and replacement are unavailable, leaving 35 HP depending existing alternating current, or the users must rebuild the battery pack using batteries themselves available. An external battery charger was available and could also function calculator from charger, with or without batteries installed.

Internally, the calculator was organized around a serial processor chipset (a bit) floating point number processing 56-bit, 14-digit numbers representing BCD.

It was introduced at a price of U.S. $ 395.1 and was available from January 4, 1972 to 1975. During that time over 300,000 units sold.

Before the HP 35, the only practical portable devices to perform trigonometric and exponential functions were slide rules. At that time, existing pocket calculators had only four functions, ie could only add, subtract, multiply and divide. Originally it had been known simply as "The Calculator", but Hewlett suggested that it should be called the HP 35 because it had 35 keys.

HP 35 was developed in two years, HP 35 was released in 1972.

## Stainless Diesel HP Calculator

Big12V

1

This Paid app allows you to Calculate Horsepower and estimated Mph of you Diesel pickup with the weight of your vehicle and 1/4 Elapsed Time. Also in this paid version you can get an estimated 1/4 and 1/8 Elapsed Time from entering your vehicle weight and horsepower, also by entering you tire size example 265 70 16 and your RearEnd Ratio and max engine Rpm you want to run, then choosing your truck and transmission you can calculate your MaxMPH per gear for your transmission.

## Scientific & Programmers Calc

CalcTastic is many powerful calculators in one: A full-featured scientific & statistical calculator with fractions and unit conversions. CalcTastic is also Android's ONLY full-featured programmer's calculator.

Visit our website for high-resolution screenshots. http://www.calctastic.com

What does the full version include that the free version doesn't?

- Fractions

- Full Landscape Support

- 7 Premium Themes (12 total)

- Android's ONLY full-featured Programmer's Calculator

GENERAL

- Algebraic, Sequential or RPN input methods

- Postfix notation

- Expression or Stack Display

- Expression History with 20 records

- Calculator Stack with 50 registers

- Memory with 10 registers

- 12 high-quality themes

- Copy and Paste

- Configurable numeric display (decimal point and digit grouping)

- Intuitive long-click feature removes the need to press SHIFT

- Easier to use than an HP 11C / 15C

SCIENTIFIC

- Fractions and Fraction Calculations

- Convert Decimals to Fractions

- Degree/Minute/Second Conversions

- Standard, Scientific, Engineering and Fixed Decimal Notations

- Configurable Precision from 0 - 12 digits

- Table of 44 Physical Constants

- Over 210 different conversion units across 14 categories

- Trig functions in Degrees, Radians or Grads (w/ hyperbolic equivalents)

- Conversions between Degrees, Radians and Grads

- Natural and Base-10 Logarithms

- Percent and Delta Percentage

- Mod(Remainder), Absolute, Ceiling, Floor and Round operations

STATISTICAL

- Factorial and Gamma Functions

- Combinations and Permutations

- Random Number Generator (random decimal or random in given range)

- 15 Single-Variable Statistics commands operate on all stack entries

- Quantity, Min, Max, Range, Sum, Median

- Arithmetic Mean, Geometric Mean, Mean Squared

- Sum Squared, Sum of Squares of Variance

- Sample Variance, Sample Standard Deviation

- Population Variance, Population Standard Deviation

PROGRAMMER

- Binary, Octal, Decimal and Hexadecimal display and conversions

- 100% support for all common integer-sizes (8, 16, 32 and 64 bit)

- Every integer-size is supported in both SIGNED and UNSIGNED modes

- Calculation History viewable in all four bases

- Conversion casts between any two integer-sizes

- Dedicated binary-bit display for all 64-bits

- Instant access to toggle any binary bit

- Bitwise logic operations AND, OR, XOR, NAND, NOR, XNOR

- Bitwise shift operations (correctly differentiates between SIGNED and UNSIGNED right shifts)

- Roll Left and Right for quick number entry

- 1's and 2's complement. Native interpretation is 2's complement

- Byte and Word flipping (ie LSB and LSW display)

- Random Number Generator (random bits at any integer-size)

## Free42

Free42 is a re-implementation of the HP-42S calculator and the HP-82240 printer.

It is a complete rewrite, not using any HP code, and it does not require an HP-42S ROM image.

Free42 is an Open Source project. The executables and source code are released under the terms of the GNU General Public License, version 2.

All third-party code used in Free42 is either in the public domain, or licensed under terms compatible with GPLv2, or used with the authors' permission.

It is a complete rewrite, not using any HP code, and it does not require an HP-42S ROM image.

Free42 is an Open Source project. The executables and source code are released under the terms of the GNU General Public License, version 2.

All third-party code used in Free42 is either in the public domain, or licensed under terms compatible with GPLv2, or used with the authors' permission.

## 15C Scientific Calculator Free

It is a demo version of Vicinno 15C Scientific Calculator. It demonstrates how Vicinno 15C works on various Android devices. The functionality of the demo version is limited since both f and g keys are disabled. If you are interested in its pro version, please search for "Vicinno" on Google Play.

15C Scientific Calculator

As a powerful emulator of HP 15C Scientific Calculator, Vicinno 15C Scientific Calculator provides all functions of the world-renowned HP 15C RPN high-end scientific programmable calculator for Android. It uses the identical mathematics and calculations with the original to give you the same precision and accuracy.

It can perform numerical integration and solve the roots of equations in addition to supporting complex numbers and matrix calculations.

**** Cool Tip: click the upper right logo to see the settings page for more options. ****

**** Please be noted: the f (i) in our app works a little differently from the real calculator: instead of hold and release, just click the f (i), the display will show the imaginary part for a second, then switch to real part automatically. *****

★ Features include:

• 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

• enable/disable key click sound

• Comma as decimal point option

• Automatically save/restore settings

• Touch logo to see all settings

• Direct access to support forum from app

• Support Android Tablet

• More

★ Support:

Feel free to contact us at support@vicinno.com.

★ Stay tuned:

Like us: www.facebook.com/vicinno

Follow us: www.twitter.com/vicinno

## WRPN 16c

It uses Reverse Polish Notation (RPN), which uses the ENTER key instead of the "=" (equals) key.

In addition to all the functions you'd expect from an ordinary calculator, WRPN 16c also has many features specifically designed for the computer professional:

• Word sizes from 1-64 bits per word

• Signed math (1's complement, 2's complement, unsigned)

• Logical operators (and, or, xor, not, masks, etc)

• Bit-wise operators (shift, rotate, rotate with carry, etc)

• 32 storage registers

• 4 position stack

• 203 lines of program memory

WRPN 16c is available on other platforms, such as Windows, MacOS, and Linux from the following web site http://www.wrpn.emmet-gray.com

Note: The source code to WRPN 16c is also available!

## HP Calculator by Sage Energy

Sage HP Calculator was designed for gas engineers.

Features:

- Estimate compressor power based on suction pressure, discharge pressure and flow rate

- Date wheel for a rough project timeline

- Unit converter for pressure, flow rate, power and temperature

Created for Sage Energy Corp. (Calgary, Alberta, Canada)

## Slide Rule

Ever heard of a slipstick? Or, more appropriately, a slide rule?! What the heck is that? Before scientists, mathematicians, and engineers had fancy calculators, they had to rely on the slide rule for their rapid number crunching.

Thanks to the AWESOME POWER of logarithmic scales a slide rule gives you several computational features using your very own virtual, mechanical computer. With this slide rule, you can: multiply and divide, multiply chains of numbers, find reciprocals, determine squares / square roots / cubes / cube roots, base-10 logarithms, and sines / cosines / tangents / cotangents.

Contains support for both phone and tablet devices. Provides ANIMATED built-in help for maximizing your slide rule usage.

This app will definitely help establish your nerd-cred.

## Prime Calc

Aeiou

1

PrimeCalc - free scientific symbolic calculator

- 70 functions, 20 mathematical constants and up to six variables

- New functions and constants can be defined by the user

- Supports complex numbers

- Matrices, vectors, sets and calculations on them

- Solves the mathematical equations

- Calculate the integrals and derivatives

- Step-by-step calculations

- And many more

Supported functions, operators, and mathematical constants:

Arithmetic:

Operators +, -, ×, ÷, %

x^n - nth power of x

√(x) - Square root of x

√(n, x) - nth root of x

ln(x) - Natural logarithm of x

log(x) - Logarithm of x to base 10

log(n, x) - Logarithm of x to base n

∑(f(x), imin, imax) - Summation of f(x) from imin to imax

∏(f(x), imin, imax) - Product of f(x) from imin to imax

Mathematical analysis:

∫(f(x)) - Indefinite integral of f(x)

∫(f(x), xmin, xmax) - Definite integral of f(x) from xmin to xmax

∂(f(x)) - Derivative of f(x)

lim(f(x), c) - Limit of f(x) when x approaches c

Equation solving:

Representation of polynomial - x^2+3x-2=0

= - Polynomial equation operator

Numerical Functions:

m mod n - Remainder of m ÷ n

gcd(m, n) - Greatest common divisor of m and n

lcm(m, n) - Least common multiple of m and n

abs(n) - Absolute value of n

round(n) - Integer closest to n

frac(n) - Fractional part of n

floor(n) - Floor value of n

ceil(n) - Ceiling value of n

Complex numbers:

Representation - 5+2i

re(c) - Real part of complex number c

im(c) - Imaginary part of complex number c

Statistics:

median([a]) - Median of [a]

gmean([a]) - Geometric mean of [a]

amean([a]) - Arithmetic mean of [a]

randi(n) - Random integer from 0 to n

randr - Random real from 0 to 1

Number theory:

harmonicN(n) - nth harmonic number

Combinatorics:

n! - Factorial of n

binomial(n, k) - Binomial coefficient

multinomial(n1, n2, ...) - Multinomial coefficient

catalanN(n) - nth Catalan number

fibonacci(n) - nth Fibonacci number

Trigonometric functions:

sin(x), cos(x), tan(x)

sec(x), csc(x), cot(x)

asin(x), acos(x), atan(x), acot(x)

Hyperbolic functions:

sinh(x), cosh(x), tanh(x)

arsinh(x), arcosh(x), artanh(x)

Matrixes:

Representation - [[1,2],[3,4]]

[m1]⋅[m2] - Product of [m1] and [m2]

tran([m]) - Transpose [m]

ctran([m]) - Conjugate and transpose [m]

inverse([m]) - Invert [m]

det([m]) - Determinant of [m]

tr([m]) - Trace of [m]

mpow([m], n) - nth matrix power of [m]

Number sets:

Representation - [1,2]

union([a1], [a2]) - Union of two sets

intersec([a1], [a2]) - Intersection of two sets

max([a]) - Largest element of [a]

min([a]) - Smallest element of [a]

Constants:

π - Number Pi

e - Euler's number

i - Imaginary unit

∞ - Infinity

γ - Euler–Mascheroni constant

G - Catalan's constant

A - Glaisher–Kinkelin constant

φ - Golden ratio

κ - Khinchin's constant

C₂ - Twin prime constant

ζ₃ - Apéry's constant

B₄ - Brun's constant for prime quadruplets

B₂ - Brun's constant for twin primes

EB - Erdős–Borwein constant

δ - Feigenbaum first constant

α - Feigenbaum second constants

BL - Legendre's constant

M₁ - Meissel–Mertens constant

## Calcularis Scientific Calc

Calcularis: The only scientific calculator you will ever need.

A history feature will allow you to save as many equations as you need and allow you to retrieve them when needed or edit them. No need to press the = button because Calcularis is always calculating.

The full equation with multiple lines makes it easy to keep track of what your are calculating. All the standard scientific functions are on visible keys. There is a scientific and engineering notation mode as well.

Simply the the best free scientific calculator on the market.

The paid mode has the following additional features:

* applications such as Tip and split calculator, Loan calculator, math equations like quadratic equation.

* large set of constants

* unit conversions

* more functions accessed from the FN button

* more key layouts such as a 10 Key and Programmer/logical calculator accessed from the KEYS button

During the trial period (two weeks), you can use the features of the paid mode to try them out. After the trial period, the main features of the calculator will continue to work and will remain free.

Move over RealCalc, the new #1 Android scientific calculator has arrived. Some have asked the question whether you still need your TI, HP, Casio or Sharp calculators. The answer is yes. Phones are not usually allowed in the classroom or in testing centers. You will always need your old calculator for that. Plus calculators like TI-83, TI-84, TI-89 and TI-Nspire include graphing capability that is not currently supported.

## Scientific Calculator

CalcTastic FREE is a powerful yet easy to use, full-featured scientific, statistical and conversion calculator with NO ADS!!

Visit our website for more high-resolution screenshots. http://www.calctastic.com

If you find CalcTastic Free useful, post a review or consider purchasing our full version to support development. The full version also includes:

- Fractions

- Full Landscape Support

- 7 Additional Themes (12 total)

- Android's ONLY full-featured Programmer's Calculator

- Base conversions between Hexadecimal, Decimal, Octal and Binary

CalcTastic FREE includes the following:

GENERAL

- Algebraic, Sequential or RPN input methods

- Postfix notation.

- Expression or Stack Display

- Expression History with 20 records

- Calculator Stack with 50 registers

- Memory with 10 registers

- 5 high-quality themes

- Copy and Paste

- Configurable numeric display (decimal point and digit grouping)

- Intuitive long-click feature removes the need to press SHIFT

- Easier to use than an HP 11C / 15C

SCIENTIFIC

- Degree/Minute/Second Conversions

- Standard, Scientific, Engineering and Fixed Decimal Notations

- Configurable Precision from 0 - 12 digits

- Table of 44 Physical Constants

- Over 210 different conversion units across 14 categories

- Trig functions in Degrees, Radians or Grads (w/ hyperbolic equivalents)

- Conversions between Degrees, Radians and Grads

- Natural and Base-10 Logarithms

- Percent and Delta Percentage

- Mod(Remainder), Absolute, Ceiling, Floor and Round operations

STATISTICAL

- Factorial and Gamma Functions

- Combinations and Permutations

- Random Number Generator (random decimal or random in given range)

- 15 Single-Variable Statistics commands operate on all stack entries

- Quantity, Min, Max, Range, Sum, Median

- Arithmetic Mean, Geometric Mean, Mean Squared

- Sum Squared, Sum of Squares of Variance

- Sample Variance, Sample Standard Deviation

- Population Variance, Population Standard Deviation

## CustomCalc Custom Calculator

Free Download! no Ads!

CustomCalc, Financial and Scientific customizable calculator app like no other!

CustomCalc is a unique, fully customizable calculator app that allows you to add all your most used functions at the swipe of a screen.

CustomCalc has a very user friendly interface so just about anyone can customize this financial and scientific calculator app. Select RPN mode if you like HP RPN, or select Algebraic mode with a unique intelligent parenthesis button, complementing an outstanding array of built-in functions and features. Redefine the whole keyboard to customize it in pretty much any way desired. Qualified by customers as the best replacement for HP's scientific and financial calculators (HP12C and HP48) and the best alternative to RealCalc scientific calculator.

Your common unit converter calculator app in just one touch (also for currency converter calculator).

It offers in addition to powerful financial, business, currency converter, trigonometric, scientific (real and complex), statistical, unit converter, HEX/BIN base, and date and time calculator.

- Automatic Worksheets

- RPN or Algebraic mode

- Memory registers table, easy but powerful, for number storage.

- Improved dimensional number format for currency, time, date, percent, degrees, units (length, area, etc.)

CustomCalc is designed by Visacsoft, experienced software developers that started with Palm operating systems more than 11 years ago.

- Assign any function to any button to execute it in one touch! without browsing for it (including unit converter)

- Financial Functions (PV, FV, PMT, interest converter, NPV, IRR, etc)

- Business Functions (+Tax, -Tax, Delta %, Break-even point, etc)

- Currency Converter (assign any currency to any button, store your exchange rate manually or online update all)

- Scientific Calculator (all log and exponential functions, all trigonometric functions, etc)

- Date and Time Functions (add days, subtract days, Day of Week, to hour, min, & sec, to hr decimal, etc)

- Unit Converter calculator, assign any button with any unit (Length, Area, Volume, Mass, Force/Weight, Pressure, Temperature, Power, Speed, Energy/Work) and execute it in one touch.

- Statistical Functions (With two variables, Mean, Sum, Standard Deviation, Weighted Mean, 6 Curve Regressions)

- Automatic Worksheets (TVM, Cash Flow, Bond, Interest Converter, Break-Even Point, Currency Exchange, Statistical, Data Edit)

- Complex numbers for scientific and trigonometric functions.

- HEX/BIN/OCT base numbers and bitwise functions AND, OR, XOR, NOT, Shift Left, and Shift Right

## RPN Calculator

Easy-to-use calculator for simple mathematical operations using powerful Reverse Polish Notation (RPN), like HP calculators as HP-48 series or HP-12C.

This app is ad-supported (that's the only purpose for which network access permission is used). If you prefer, a Premium version is also available with some additional buttons, no ads and no network access permission necessary.

Instructions

=========

The stack

----------------

When you type a number and press Enter, the number is stored in the lowest position of the stack, marked by 1:

If you type another number and press Enter, the second number takes the lowest position, and the first number is pushed to position 2: (if you just press Enter without typing a new number, the first number is duplicated).

You can store up to 50 numbers in the stack, even though the screen only shows the numbers on the 4 lowest positions (1: to 4:)

If you press the Down arrow, the number in the lowest position in the stack is erased, and the others are popped one position down.

Press C to cancel the number while you are typing. Press C again to clear the stack.

Mathematical operations

-----------------------------------

If you press one of the mathematical symbols (+,-,x,÷), the corresponding operation is executed using as operands the two numbers in the lowest positions of the stack.

If you press one of the mathematical symbols while typing a number, the operation is executed between the number in the lowest position of the stack and the number that you are currently typing.

The ± key will change the sign of the number that you are currently typing or that of the number in the lowest position of the stack otherwise.

Example

--------------

If you want to compute the operation 2 x (8 - 5) do as follows:

- Type 8 and Enter

- Type 5 (followed optionally by Enter) and -

(You can also sum -5 doing: 5, ±, +)

- The lowest position of the stack shows the partial result (3)

- Type 2 and x (or 2, Enter, x)

- The final result (6) is shown on the bottom of the stack

# More from developer

## Scientific/Financial RPN DEMO

** DEMO VERSION of My RPN Calc 1.61 **

My RPN calculator is a scientific and financial calculator inspired by the Hewlett-Packard HP-10C series pocket calculators of the 80s, most notably the HP 12C and HP 15C models.

These software version has borrowed the RPN (Reverse Polish Notation) and the look&feel of those calculators. It features classical 4 operations, logarithms, trigonometry, statistics, financial,and macros for easy programming. It also features complete support for complex numbers along with 2nd, 3rd, and 4th degree equations solving.

Its unique magenta L key allows switching from one layout to another, thus saving space on small displays like smartphones without compromising usability.

Support for gestures allows switching from one keyboard to another by swiping left or right, and a light swipe up or down on a key executes the associated f or g function, without any need to actually press the f or g key.

See the web pages of the application at http://calc.lsrodier.net for complete keys description and samples.

My RPN calculator is compatible with all devices running Android 2.1 and up and supports both horizontal and vertical orientations. It does however requires a device with a minimum screen resolution of 320x480 (or 480x320 according to orientation). Note that tablet screens 1280x800 and 1024x600 are properly managed.

Summary of the main functions:

* RPN input

* Portrait/landscape and multi-resolution layouts

* Gesture support for extended/simplified inputs

* Arithmetic functions (+, -, x, /, 1/x, +/-, etc)

* Trigonometry, logarithms, hyperbolic trigonometry

* Percentages (+, -, variation, total)

* Dates

* Complete complex numbers support

* 2nd, 3rd, and 4th grade equations solving

* Unit conversions (temperatures, distances, etc)

* Macros (up to 10 programs) for simple programming tasks

Summary of the main statistical functions:

* 1- and 2-variable statistics

* Sums (Σx, Σx2, Σy, Σy2, Σxy)

* Mean, weighted mean, standard deviation

* Linear regression

* Correlation coefficient

* Linear estimation

Summary of the financial functions:

* Simple and compound interests

* Cash flow analysis (NPV, IRR)

* Depreciation (SL, DB, SOYD)

## 5x7 LED chronometer

A simple yet effective 5x7 led chronometer as we usually see around sport arenas. It features typical options like pause, stop, resume, restart, and markers.

See the web pages of the application for complete description.

5x7 LED chronometer is compatible with all devices running Android 2.1 and up, and supports both horizontal and vertical orientations.

## Cyclodraw drawing toy

Cyclodraw is a mandala geometrical drawing application. It mostly produces mathematical curves technically known as hypotrochoids and epitrochoids, along with gears, ellipses and rectangles. Curves can be layed together to produce fantastic drawings. The application has been designed for creativity (especially children creativity) without any mathematical knowledge ever required.

## Voice Office/Kids calculator

VOCal is a classical office calculator with a virtual tape to print all operations. When operating in children mode, the additions, substractions and multiplications are presented in columns as children are used to compute. The optional voice option turns on/off the reading or spelling of the numbers and operations.

Common features:

* Common math operations (+, -, x, /, %, inv)

* One memory register

* Virtual tape presenting all executing operations

* Landscape/portrait layouts

* Left/right-handed landscape layouts

* Haptic feedback (optional)

Virtual tape features:

* Printing of executed operations

* Double press the C key to clear the tape

* Kid mode to print base operations using school layout

* Colored for easy reading

Voice features:

* May be turned on/off

* All keys are spelled

* All results are either spelled/read (option)

* Long tap a virtual tape line to read/spell the operation

See http://vocal.lsrodier.net for further details.

## Financial RPN calculator

My RPN calculator is a scientific and financial calculator inspired by the Hewlett-Packard HP-10C series pocket calculators of the 80s, most notably the HP 12C and HP 11C models.

These software version has borrowed the RPN (Reverse Polish Notation) and the look&feel of those calculators. It features classical 4 operations, logarithms, statistics, financial,and macros for easy programming.

Its unique magenta L key allows switching from one layout to another, thus saving space on small displays like smartphones without compromising usability.

Support for gestures allows switching from one keyboard to another by swiping left or right, and a light swipe up or down on a key executes the associated f or g function, without any need to actually press the f or g key.

See the web pages of the application at http://calc.lsrodier.net for complete keys description and samples.

My RPN calculator is compatible with all devices running Android 2.1 and up and supports both horizontal and vertical orientations. It does however requires a device with a minimum screen resolution of 320x480 (or 480x320 according to orientation). Note that tablet screens 1280x800 are properly managed.

Summary of the main functions:

* RPN input

* Portrait/landscape and multi-resolution layouts

* Gesture support for extended/simplified inputs

* Arithmetic functions (+, -, x, /, 1/x, +/-, etc)

* Logarithms

* Percentages (+, -, variation, total)

* Dates

* Unit conversions (temperatures, distances, etc)

* Macros for simple programming tasks

Summary of the main statistical functions:

* 1- and 2-variable statistics

* Sums (Σx, Σx2, Σy, Σy2, Σxy)

* Mean, weighted mean, standard deviation

* Linear regression

* Correlation coefficient

* Linear estimation

* Statistical registers table

Summary of the financial functions:

* Simple and compound interests

* Cash flow analysis (NPV, IRR)

* Depreciation (SL, DB, SOYD)

* Financial registers table

## Thank You!

A most "useful" application displaying Thank You. A good match to the classical Hello World application though this one tries to display the Thank You text in as big letters as possible.

Did I mention it actually displays Merci on French devices and Grazie on Italian ones ? Definitly the "must have" application in the category of the useless ones !

## My talking calculator

The Clouseau Calc is a talking 4-operations calculator with a strong French accent. As a calculator it is useful by itself as it offers the common operations found on small calculators (+, -, /, x, %, 1/x) along with a single memory register. It is however unique when the voice option is turned on (default), as it also speaks, reading/spelling the computed values or describing the executed functions, not to mention the "Oh la la" mode.

See the web site pages at http://clouseau.lsrodier.net for a complete listing of the vocabulary and available idioms and accents.

Clouseau Calc is compatible with all devices running Android 2.1 and up and supports both horizontal and vertical orientations.

## Scientific/Financial RPN calc

My RPN calculator is a scientific and financial calculator inspired by the Hewlett-Packard HP-10C series pocket calculators of the 80s, most notably the HP 12C and HP 15C models.

These software version has borrowed the RPN (Reverse Polish Notation) and the look&feel of those calculators. It features classical 4 operations, logarithms, trigonometry, statistics, financial,and macros for easy programming. It also features complete support for complex numbers along with 2nd, 3rd, and 4th degree equations solving.

Its unique magenta L key allows switching from one layout to another, thus saving space on small displays like smartphones without compromising usability.

Support for gestures allows switching from one keyboard to another by swiping left or right, and a light swipe up or down on a key executes the associated f or g function, without any need to actually press the f or g key.

See the web pages of the application at http://calc.lsrodier.net for complete keys description and samples.

My RPN calculator is compatible with all devices running Android 2.1 and up and supports both horizontal and vertical orientations. It does however requires a device with a minimum screen resolution of 320x480 (or 480x320 according to orientation). Note that tablet screens are properly managed.

Summary of the main functions:

* RPN input

* Portrait/landscape and multi-resolution layouts

* Gesture support for extended/simplified inputs

* Arithmetic functions (+, -, x, /, 1/x, +/-, etc)

* Trigonometry, logarithms, hyperbolic trigonometry

* Percentages (+, -, variation, total)

* Dates

* Complete complex numbers support

* 2nd, 3rd, and 4th grade equations solving

* Unit conversions (temperatures, distances, etc)

* Macros for simple programming tasks

Summary of the main statistical functions:

* 1- and 2-variable statistics

* Sums (Σx, Σx2, Σy, Σy2, Σxy)

* Mean, weighted mean, standard deviation

* Linear regression

* Correlation coefficient

* Linear estimation

* Statistical registers table

Summary of the financial functions:

* Simple and compound interests

* Cash flow analysis (NPV, IRR)

* Depreciation (SL, DB, SOYD)

* Financial registers table

## Bbuzz, basketball buzzer

Bbuzz, Basketball buzzer, is a 5x7 LED countdown chronometer as we usually see around sport arenas, especially with basketball games. When it reaches zero, it plays a buzzer sound. Both the countdown time and the buzzer may be tuned through the options dialog.

A typical usage is basketball, where one touchs the screen whenever the ball is in play or the referee whistles, and the player icon is pressed when the ball changes hand. Bbuzz also supports the 14s rule when a foul is made less than 14 seconds before the end of the 24 seconds.

Bbuzz is compatible with all devices running Android 2.1 and up and supports both horizontal and vertical orientations.