The code is open source and available at https://github.com/lpar/RPN
Found a bug? E-mail firstname.lastname@example.org
Looking for fractions? Degrees/minutes/seconds? Landscape mode? You need RealCalc Plus. See elsewhere on this page for the link, or select 'Upgrade' from the RealCalc menu.
RealCalc includes the following features:
* Traditional algebraic or RPN operation
* Unit conversions
* Physical constants table
* Result history
* 10 memories
* Binary, octal, and hexadecimal (can be enabled in Settings)
* Trig functions in degrees, radians or grads
* Scientific, engineering and fixed-point display modes
* 7-segment, dot-matrix or standard font display
* Configurable digit grouping and decimal point
* Full built-in help
* A complete lack of advertising
RealCalc Plus contains all these features, plus:
* Fraction calculations and conversion to/from decimal
* Degrees/minutes/seconds calculations and conversion
* Landscape mode
* 12-digit display
* Extended internal precision (32-digit)
* User-customizable unit conversions
* User-customizable constants
* New RPN styles (buffered-entry, XYZT rolling stack)
If you find RealCalc useful, please consider purchasing RealCalc Plus to support further development. Thank you.
* If you want data size conversions in multiples of 1024, use kibibytes, mebibytes, gibibytes, etc - see en.wikipedia.org/wiki/Kibibyte.
* If you can't find HEX, BIN or OCT modes, go to Menu > Settings and make sure that 'Radix Modes' is checked.
* If the percent key appears to give wrong answers, make sure you are pressing '=' at the end, e.g. '25 + 10 % =' will give 27.5.
* If sin/cos/tan functions don't give the answer you are expecting, make sure you are in the correct angle mode. Degrees, radians and grads are supported, indicated by DEG, RAD, GRAD in the display. Use the DRG key to change mode.
* If any of the digit keys are disabled, or the decimal point doesn't work, or you have answers with letters in, or basic arithmetic appears to be wrong, then you are in binary, octal or hexadecimal mode. Press DEC to return to decimal operation. If you don't need these modes, please make sure that 'Radix Modes' is disabled in the settings.
Please read the help for more information.
* turn to landscape for scientific version
* large buttons using standard keypad layout
* long hold C button to clear stack
* No ads, I built it for myself and am sharing it with you.
* feature requests welcome
ps. Screenshots taken using the ANGL theme on MIUI Rom, your buttons will likely look different from shown.
-- Authentic app, developed by HP
-- Award-winning HP Support
-- Identical algorithms and calculation sequences as the original HP 15c Calculator
-- Modeled after the limited-edition 15c Calculator
-- RPN entry
-- Matrix calculations
-- Complex functions – real and imaginary
-- SOLVE key finds the root of an equation
-- Numerical integration
-- Programmable – up to 448 lines
The following Android functions are supported:
• Calculation results can be copies to the clipboard.
• Can be installed on the SD-Card.
• Participates in Androids build in backup and restore.
• Honeycomb Tablet compatible.
• Extra Printer for Honeycomb Tablets (visit our web-page for screen shot).
Please visit our web-page for more informations and support. Remember that the Market-Comments have no answer function and I can't help you if you post there.
User Interface features:
• two additional keys (mapped to the display and logo in landscape mode) are dedicated to preference settings and help
• portrait and landscape view mode with autorotate
• customized keystroke behavior (click, glow, vibration)
• toggle mode for the f and g prefix keys
• back label reference information display
• RPN (Reverse Polish Notation) entry mode, programmable
• Functions are identical to those found in the original 15C e.g. trigonometric and hyperbolic functions, factorial, combinations, permutations, random numbers, linear regression, root solving, matrix calculations, numerical integration, complex numbers and more
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.
This is a modified version of Droid48 but for HP48SX
Credit goes to Arnaud Brochard (author of droid48) and of course Eddie C. Dost - author of x48 - (See https://play.google.com/store/apps/details?id=org.ab.x48)
Source code on https://github.com/czodroid/droid48sx
Skin is not perfect but usable. I loved this calc....
Tested on galaxy s2, nexus4 5 and 7.
• Reverse Polish Notation (RPN) operating logic, the most efficient solution for evaluating mathematical expressions
• Transcendental functions: Exponential, Logarithm, Trigonometric, and Hyperbolic
• Statistical functions: Mean, Standard Deviation, and Linear Regression
• Polar and Rectangular Coordinate Conversions
• Factorial, Percentage, and Percent Difference
• Time and Angle Conversions
• By using two shift keys all functions are on one screen and are easy to find and use
• The keys are arranged as a basic four function calculator and most simple calculations can be done without using the shift keys
RPN Calculator requires an Android Wear watch to run. The app that's installed on your phone or tablet is the installer only and does not run the calculator. RPN Calculator will be installed on your watch and ready to use when paired.
Right now RPN Calculator only works on the Moto 360, LG G, and LG G Watch R. I'll soon be offering a version with a GUI that looks great on all Android Wear watches.
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)
* 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
I'm Calculator Plus - the perfect calculator for Android. I'm easy to use and beautifully designed to do things better than your phone or handheld calculator ever did.
I'm big, easy to read, and I love saving you time and effort. I remember everything you calculate, and let you review it anytime, making me perfect for shopping, doing homework, balancing checkbooks, or even helping with taxes. And if you need to quit and go do something else, I'll have it all waiting for you when you come back. You'll never need to type the same calculation twice again.
I'm attractive and effective and I make great use of your big, beautiful display:
- I show your calculations in clear, elegant type that's easy to read, with commas just where they should be
- You'll never lose track of where you are in a calculation - I show you exactly what's happening at all times
- I remember everything, so you can take a break, then come back later and pick up where you left off
- You can use backspace anytime to correct a simple mistake, instead of starting over
- Use memory to keep a running total you can actually see
- Swipe memory keys aside if you need more advanced math functions
- My percentage key shows exactly what it did, so you're not left confused
- My intuitive, lovable design makes it simple to do everyday calculations on your phone or tablet
Let Calculator Plus on your phone or tablet finally put that handheld calculator to rest.
No ads, no spyware, no bs.
It has an interface that users of the HP 12C financial calculator line will be completely at home with, but does much more. Calculations are far faster, doing in a fraction of a second what the classic calculator could take minutes to compute.
RpnCalc Financial is a highly versatile full-function programmable financial calculator. It includes math, finance, and statistics functions.Features include:
* Time value of money (TVM)
* Cash flow analysis: IRR, NPV
* Bond pricing
* Date and interest calculations
* Percentages, markups, percentage of total
* Scientific mode
* Basic (large key) mode
* 20 Memories
* 99 Program steps
* Key click (haptic feedback)
* Continouous memory
Improvements over the classic HP 12C:
* 16-level stack
* Front four stack elements displayed
* Programs can be saved and restored
* Programs displayed symbolically
* Memories are not sacrificed to make room for program steps
* Full amortization display, register display, NPV display, and program display.
RpnCalc Financial has a sixteen-level stack to hold more data. The front four elements on the stack are visible at all times, making it much easier to keep track of where you are in your calculations.
Calculator programs are stored and displayed symbolically, making programming much easier. Programs can be stored and retrieved from the sd card whenever your Android is in file-sharing mode.
See http://www.efalk.org/RpnCalcFinancial for a full description.
If you want to "test drive" a similar calculator before purchasing, try the free "RpnCalc" scientific calculator.
No ads. No nonsense.
Great for hikers or anybody else who would like to know their elevation.
This is what is known in aviation as a "sensitive altimeter", meaning that altitude is calibrated based on a sea-level reference pressure. Touch the altimeter face to bring up the Kollsman adjustment window. Enter the current sea-level pressure (altimeter setting) to calibrate the altimeter. OR, enter the known local elevation to get the altimeter setting.
If you don't know the current altimeter setting, use 29.92.
See Wikipedia for more information about sensitive altimeters and how they're used: https://en.wikipedia.org/wiki/Altimeter. Aviation altimeter settings can be obtained from aviation weather reports (see https://en.wikipedia.org/wiki/METAR) and airport information broadcasts (https://en.wikipedia.org/wiki/Atis) if you have an aircraft-band radio.
Pro-tip: use the Kollsman window to set the local elevation to zero, to get the local barometric pressure.
Preferences allow you to select altitude (meters or feet), pressure units (inches mercury or millibars), screen orientation, and keep screen on.
Not approved for aviation use. Compare to a real altimeter before you even think of using this, even as a backup.