i41CX vs RPN

i41CX is the same powerful advanced programmable RPN scientific calculator as the highly acclaimed i41CX+ but without the latter’s incredibly advanced capabilities such as the printer, expansion, CAS, etc. It is functionally equivalent to the world-renowned HP-41CX and inherits all of the i41CX+ usability features including extremely responsive and animated key clicks, audible key feedback sounds, optimally spaced keys for accurate input, traditional and upbeat modern diverse set of skins, etc. If you are looking for a powerful programmable RPN scientific calculator but don’t need all of the capabilities of i41CX+ then i41CX is for you. And best of all, if you ever decide that you need the more advanced capabilities of i41CX+ you can enable them using secure in-app purchases right within the app! FEATURES: • RPN logic with a 4 element deep memory stack • 319 main and 124 extended memory registers • Over 300 built-in functions, including nearly 100 functions created specifically for i41CX • Time, calendar, alarm, and stopwatch functions • Rich set of functions and algorithms: numerical, mathematical, statistical, and much more • Access to the entire HP-41 library of solutions for science, mathematics, statistics, engineering, business, financial, surveying, medicine, real estate, and many other domains • Programmable - Over 2000 lines • User definable keyboard • Ability to operate the calculator using a Bluetooth keyboard • Device integration: external display mirroring, copy and paste, GPS, accelerometer, digital compass, time and date synchronization, and much more • iOS 8 Notification Center widget • Sound support including synthetic tones and interface sounds • Support for calculator skins and optional mini stack display • Adjustable sound volume and display colors • Usage & Examples table with usage tips and examples • Quick reference guide of all built-in functions • Beautiful and clean user interface *********************************************************** A comprehensive FAQ is available at http://alsoftiphone.com/i41CX. Please don't hesitate to use the "Contact Us" link there if you cannot find the answers or information that you seek. Thank you.

RPN-45 HD is a complete simulation of the scientific hand-held calculator HP-45 from 1973. Processing times and behavior have been carefully modelled after the original. Switch to the "Super-45" mode and watch the HP-45 do things never seen before. Features: • Photo-realistic look based on an existing device • Animated keys with adjustable click sound and visual feedback • All functions and operations of the HP-45 fully implemented • Supports "secret" timer. Use it as 12/100-hours timer or even as a chess clock. • Optional hyperbolic functions • Simulation of the HP-45's computation times (optional) • Correct wrong number entries by swiping left across the display • Cut/copy/paste display value • "Live" display of stack and all memory registers (in landscape mode) • Built-in manual • 30 selectable background images, even add your own • HP-91-like paper tape printer: - Supports MAN, ALL, and NORM modes - Quickly insert arbitrary text - Delete any line - Send tape via E-Mail or to any AirPrint-capable printer - Ribbon color black or blue - Optionally print negative results in red - Print stack and registers • Supports external hardware keyboard Turn on "Super-45" and enjoy a super-charged HP-45: • Complex numbers: available for almost all operations and functions • More memory: twice the number of memory registers. • "Continuous" stack and memory registers • Improved functions: - Raise any number to any power - Factorial of any number, incl. complex - Logarithm and square root of negative numbers - Preset timer with the iPad's real time - Chess clock mode • New functions: - Solve linear equations in two or three unknowns - Find the roots of quadratic and cubic equations - Statistics: normal distribution and correlation coefficient of paired variables - Linear regression, combinations, permutations - Logarithm to any base, incl. complex - Integer and fractional parts - Display rounding - Random numbers in a given range - Day of the week for any date between Jan 1, 0001 and Dec 31, 9999 - Easter date for any year between 1583 and 4099 - Support for Julian dates - Number of days between any two dates - Last Stack - Convert display value to hexadecimal - Percentage of sum - Register arithmetic includes sum registers and LAST x - Clear all registers - Backup registers in a protected area • Enhanced user interface: - Visual indicators for prefix keys and angular modes - Small values switch to scientific notation if required - Localized decimal point - Thousand's separator For more information and sample calculations visit cuveesoft.ch/rpn45/en WHAT USERS SAID: "A great simulation of the HP-45. Beautifully made, with a lot of attention to small details." "This is by far the best RPN calculator available for the iPad!" "This is one of the most accurate but also nicest looking emulators I have come across for the HP-45, or any vintage HP calculator for that matter." "This is exactly what I've been searching. My HP 45 packed up some time ago. Thank you so much!"