What's New

New Features:
+ iPad split view compact layout is enhanced in order to better utilize excess vertical space.
+ iPhone [modqr] key is switched with [gcd] key to give better support for encryption/decryption calculations.
+ Natural log based factorial keys ([lnx!], [lnΓx], [ln(x|y)]) are replaced with base 10 log versions.

BUG Fixes:
+ None.

Document Updates:
+ Section 2.9: Error codes 8, 9, 10 updated.
+ Section 3.1: Scientific calculator function key changes updated.
+ P.s. You can open Document View by tapping OPTIONS (on top right) then [help] key in keypad.

App Description

Ease of use and beauty in mind, designed for every family member (parents, students) and professionals (finance, engineering, science) by combining comprehensive set of household financial calculations (loans, mortgages, "what-if" analyses), statistical calculations and scientific/engineering functions into a single package.

RPNscfi is a 15-digit RPN calculator with unlimited stack debt. It supports numbers greater than or equal to |2^-1022| (~10^-308), and less than |2^+1024| (~10^+308).

■ Tap “OPTIONS” and tap [Help] key to view User’s Manual
• Jump to Section 1.3 for a quick tour and continue reading Section 1.4.
• If you are not familiar with RPN calculator, please refer to Section 2.6.

■ VoiceOver enabled universal app

■ Financial Calculator
• Mortgage, Loan calculations
• Amortization schedule (copy or e-mail, CSV or text formats; select and paste)
• Savings plan, Pension fund calculations
• Savings account, Appreciation, Depreciation calculations
• Lease with/without residual value calculations
• Interest rate conversions (e.g., dividend to annual interest rate and vice versa)
• Calendar functions with dynamically localized date output
• Help you to understand and manage your budget with “what-if” analyses

■ Statistics Calculator
• Mean (μ), population (σ) and sample (s) standard deviations, weighted mean (μ.w)
• Normal, log-normal, log-log least-square regression analyses (tested with a million data samples)
• Equation output, x and y estimators, r: Pearson product-moment correlation coefficient
• Powerful edit feature: edit any record, export/import your data between IOS devices and desktop computers
• Test generator to get acquainted with statistics calculator
• Regression graph feature: will guide you to visually navigate your datasets

■ Scientific Calculator
• Common trigonometric, hyperbolic, logarithmic and exponentiation functions (base e, 10, and 2)
• Arbitrary rounding, mod operation, various ceil and floor functions, percentage functions
• Factorial function, binomial coefficient and greatest common divisor calculations

■ Unit System Conversion Calculator
• Simple yet useful to address daily metric to/from imperial conversion needs.
• 4 length, 5 area, 2 weight, 2 volume, 1+ temperature cross units conversions, plus little more.

■ Built-in PDF User’s Manual
• E-mail or print User’s Manual
• While reading, rotate device to exercise examples, and rotate again to resume reading
• All financial features are explained and demonstrated with annotated examples

■ Additional Features
• Easy-to-review on-demand non-intrusive tape
• Built in tape history browser and editor
• Gives you true record of all calculations
• Features copy, selective copy, and e-mail.

■ Easy configuration via Gestures
• US & EU number formats
• 5 number notations: DEC, FIN, ENG, SCI, UNF
• 2 trigonometric angle modes: DEG, RAD
• Fixed-point (FIN) and fixed-digit (ENG) number notations
• 4 keypad themes, 3 keypad fonts, 3 display fonts, 3 tape fonts, and 4 display & tape font colors

iPhone Screenshots

(click to enlarge)

RPNscfi – Financial and Scientific RPN Calculator screenshot 1 RPNscfi – Financial and Scientific RPN Calculator screenshot 2 RPNscfi – Financial and Scientific RPN Calculator screenshot 3 RPNscfi – Financial and Scientific RPN Calculator screenshot 4 RPNscfi – Financial and Scientific RPN Calculator screenshot 5

iPad Screenshots

(click to enlarge)

RPNscfi – Financial and Scientific RPN Calculator screenshot 6 RPNscfi – Financial and Scientific RPN Calculator screenshot 7 RPNscfi – Financial and Scientific RPN Calculator screenshot 8 RPNscfi – Financial and Scientific RPN Calculator screenshot 9 RPNscfi – Financial and Scientific RPN Calculator screenshot 10

App Changes

  • June 15, 2014 Initial release
  • October 08, 2014 New version 1.63
  • November 03, 2014 New version 1.64
  • February 06, 2015 New version 1.71
  • April 27, 2015 New version 1.72
  • July 07, 2015 New version 1.73
  • October 10, 2015 New version 1.74
  • November 24, 2015 New version 2.0
  • December 15, 2015 New version 2.01
  • January 12, 2016 New version 2.02
  • July 08, 2016 New version 2.35